diff --git a/lib/irb/irb.gemspec b/lib/irb/irb.gemspec
index 84fe4fff68..17f0de71a1 100644
--- a/lib/irb/irb.gemspec
+++ b/lib/irb/irb.gemspec
@@ -16,7 +16,63 @@ Gem::Specification.new do |spec|
   spec.homepage      = "https://github.com/ruby/irb"
   spec.license       = "BSD-2-Clause"
 
-  spec.files         = ["LICENSE.txt", "README.md", "exe/irb", "irb.gemspec", "lib/irb.rb", "lib/irb/cmd/chws.rb", "lib/irb/cmd/fork.rb", "lib/irb/cmd/help.rb", "lib/irb/cmd/load.rb", "lib/irb/cmd/nop.rb", "lib/irb/cmd/pushws.rb", "lib/irb/cmd/subirb.rb", "lib/irb/completion.rb", "lib/irb/context.rb", "lib/irb/color.rb", "lib/irb/ext/change-ws.rb", "lib/irb/ext/history.rb", "lib/irb/ext/loader.rb", "lib/irb/ext/multi-irb.rb", "lib/irb/ext/save-history.rb", "lib/irb/ext/tracer.rb", "lib/irb/ext/use-loader.rb", "lib/irb/ext/workspaces.rb", "lib/irb/extend-command.rb", "lib/irb/frame.rb", "lib/irb/help.rb", "lib/irb/init.rb", "lib/irb/input-method.rb", "lib/irb/inspector.rb", "lib/irb/lc/.document", "lib/irb/lc/error.rb", "lib/irb/lc/help-message", "lib/irb/lc/ja/encoding_aliases.rb", "lib/irb/lc/ja/error.rb", "lib/irb/lc/ja/help-message", "lib/irb/locale.rb", "lib/irb/magic-file.rb", "lib/irb/notifier.rb", "lib/irb/output-method.rb", "lib/irb/ruby-lex.rb", "lib/irb/ruby-token.rb", "lib/irb/slex.rb", "lib/irb/src_encoding.rb", "lib/irb/version.rb", "lib/irb/workspace.rb", "lib/irb/ws-for-case-2.rb", "lib/irb/xmp.rb"]
+  spec.files         = [
+    "Gemfile",
+    "LICENSE.txt",
+    "README.md",
+    "Rakefile",
+    "bin/console",
+    "bin/setup",
+    "doc/irb/irb-tools.rd.ja",
+    "doc/irb/irb.rd.ja",
+    "exe/irb",
+    "irb.gemspec",
+    "lib/irb.rb",
+    "lib/irb/cmd/chws.rb",
+    "lib/irb/cmd/fork.rb",
+    "lib/irb/cmd/help.rb",
+    "lib/irb/cmd/load.rb",
+    "lib/irb/cmd/nop.rb",
+    "lib/irb/cmd/pushws.rb",
+    "lib/irb/cmd/subirb.rb",
+    "lib/irb/color.rb",
+    "lib/irb/completion.rb",
+    "lib/irb/context.rb",
+    "lib/irb/ext/change-ws.rb",
+    "lib/irb/ext/history.rb",
+    "lib/irb/ext/loader.rb",
+    "lib/irb/ext/multi-irb.rb",
+    "lib/irb/ext/save-history.rb",
+    "lib/irb/ext/tracer.rb",
+    "lib/irb/ext/use-loader.rb",
+    "lib/irb/ext/workspaces.rb",
+    "lib/irb/extend-command.rb",
+    "lib/irb/frame.rb",
+    "lib/irb/help.rb",
+    "lib/irb/init.rb",
+    "lib/irb/input-method.rb",
+    "lib/irb/inspector.rb",
+    "lib/irb/lc/.document",
+    "lib/irb/lc/error.rb",
+    "lib/irb/lc/help-message",
+    "lib/irb/lc/ja/encoding_aliases.rb",
+    "lib/irb/lc/ja/error.rb",
+    "lib/irb/lc/ja/help-message",
+    "lib/irb/locale.rb",
+    "lib/irb/magic-file.rb",
+    "lib/irb/notifier.rb",
+    "lib/irb/output-method.rb",
+    "lib/irb/ruby-lex.rb",
+    "lib/irb/ruby-token.rb",
+    "lib/irb/ruby_logo.aa",
+    "lib/irb/slex.rb",
+    "lib/irb/src_encoding.rb",
+    "lib/irb/version.rb",
+    "lib/irb/workspace.rb",
+    "lib/irb/ws-for-case-2.rb",
+    "lib/irb/xmp.rb",
+    "man/irb.1",
+  ]
   spec.bindir        = "exe"
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
diff --git a/lib/racc/racc.gemspec b/lib/racc/racc.gemspec
index 8e8a0b8bae..b04afcda78 100644
--- a/lib/racc/racc.gemspec
+++ b/lib/racc/racc.gemspec
@@ -8,12 +8,88 @@ Gem::Specification.new do |s|
   s.require_paths = ["lib"]
   s.authors = ["Aaron Patterson"]
   s.date = "2019-06-20"
-  s.description = "Racc is a LALR(1) parser generator.\n  It is written in Ruby itself, and generates Ruby program.\n\n  NOTE: Ruby 1.8.x comes with Racc runtime module.  You\n  can run your parsers generated by racc 1.4.x out of the\n  box."
+  s.description = <<DESC
+Racc is a LALR(1) parser generator.
+  It is written in Ruby itself, and generates Ruby program.
+
+  NOTE: Ruby 1.8.x comes with Racc runtime module.  You
+  can run your parsers generated by racc 1.4.x out of the
+  box.
+DESC
   s.email = ["aaron@tenderlovemaking.com"]
   s.executables = ["racc", "racc2y", "y2racc"]
   s.extensions = ["ext/racc/extconf.rb"]
-  s.extra_rdoc_files = ["Manifest.txt", "README.ja.rdoc", "README.rdoc", "rdoc/en/NEWS.en.rdoc", "rdoc/en/grammar.en.rdoc", "rdoc/ja/NEWS.ja.rdoc", "rdoc/ja/debug.ja.rdoc", "rdoc/ja/grammar.ja.rdoc", "rdoc/ja/parser.ja.rdoc", "README.ja.rdoc", "README.rdoc"]
-  s.files = ["COPYING", "ChangeLog", "DEPENDS", "Manifest.txt", "README.ja.rdoc", "README.rdoc", "Rakefile", "TODO", "bin/racc", "bin/racc2y", "bin/y2racc", "ext/racc/MANIFEST", "ext/racc/com/headius/racc/Cparse.java", "ext/racc/cparse.c", "ext/racc/depend", "ext/racc/extconf.rb", "fastcache/extconf.rb", "fastcache/fastcache.c", "lib/racc.rb", "lib/racc/compat.rb", "lib/racc/debugflags.rb", "lib/racc/exception.rb", "lib/racc/grammar.rb", "lib/racc/grammarfileparser.rb", "lib/racc/info.rb", "lib/racc/iset.rb", "lib/racc/logfilegenerator.rb", "lib/racc/parser-text.rb", "lib/racc/parser.rb", "lib/racc/parserfilegenerator.rb", "lib/racc/pre-setup", "lib/racc/sourcetext.rb", "lib/racc/state.rb", "lib/racc/statetransitiontable.rb", "lib/racc/static.rb", "misc/dist.sh", "rdoc/en/NEWS.en.rdoc", "rdoc/en/grammar.en.rdoc", "rdoc/ja/NEWS.ja.rdoc", "rdoc/ja/command.ja.html", "rdoc/ja/debug.ja.rdoc", "rdoc/ja/grammar.ja.rdoc", "rdoc/ja/index.ja.html", "rdoc/ja/parser.ja.rdoc", "rdoc/ja/usage.ja.html", "sample/array.y", "sample/array2.y", "sample/calc-ja.y", "sample/calc.y", "sample/conflict.y", "sample/hash.y", "sample/lalr.y", "sample/lists.y", "sample/syntax.y", "sample/yyerr.y", "setup.rb", "tasks/doc.rb", "tasks/email.rb", "test/assets/cadenza.y", "test/assets/cast.y", "test/assets/chk.y", "test/assets/conf.y", "test/assets/csspool.y", "test/assets/digraph.y", "test/assets/echk.y", "test/assets/edtf.y", "test/assets/err.y", "test/assets/error_recovery.y", "test/assets/expect.y", "test/assets/firstline.y", "test/assets/huia.y", "test/assets/ichk.y", "test/assets/intp.y", "test/assets/journey.y", "test/assets/liquor.y", "test/assets/machete.y", "test/assets/macruby.y", "test/assets/mailp.y", "test/assets/mediacloth.y", "test/assets/mof.y", "test/assets/namae.y", "test/assets/nasl.y", "test/assets/newsyn.y", "test/assets/noend.y", "test/assets/nokogiri-css.y", "test/assets/nonass.y", "test/assets/normal.y", "test/assets/norule.y", "test/assets/nullbug1.y", "test/assets/nullbug2.y", "test/assets/opal.y", "test/assets/opt.y", "test/assets/percent.y", "test/assets/php_serialization.y", "test/assets/recv.y", "test/assets/riml.y", "test/assets/rrconf.y", "test/assets/ruby18.y", "test/assets/ruby19.y", "test/assets/ruby20.y", "test/assets/ruby21.y", "test/assets/ruby22.y", "test/assets/scan.y", "test/assets/syntax.y", "test/assets/tp_plus.y", "test/assets/twowaysql.y", "test/assets/unterm.y", "test/assets/useless.y", "test/assets/yyerr.y", "test/bench.y", "test/helper.rb", "test/infini.y", "test/regress/cadenza", "test/regress/cast", "test/regress/csspool", "test/regress/edtf", "test/regress/huia", "test/regress/journey", "test/regress/liquor", "test/regress/machete", "test/regress/mediacloth", "test/regress/mof", "test/regress/namae", "test/regress/nasl", "test/regress/nokogiri-css", "test/regress/opal", "test/regress/php_serialization", "test/regress/riml", "test/regress/ruby18", "test/regress/ruby22", "test/regress/tp_plus", "test/regress/twowaysql", "test/scandata/brace", "test/scandata/gvar", "test/scandata/normal", "test/scandata/percent", "test/scandata/slash", "test/src.intp", "test/start.y", "test/test_chk_y.rb", "test/test_grammar_file_parser.rb", "test/test_racc_command.rb", "test/test_scan_y.rb", "test/testscanner.rb", "web/racc.en.rhtml", "web/racc.ja.rhtml"]
+  s.extra_rdoc_files = [
+    "Manifest.txt", "README.ja.rdoc", "README.rdoc",
+    "rdoc/en/NEWS.en.rdoc", "rdoc/en/grammar.en.rdoc",
+    "rdoc/ja/NEWS.ja.rdoc", "rdoc/ja/debug.ja.rdoc",
+    "rdoc/ja/grammar.ja.rdoc", "rdoc/ja/parser.ja.rdoc",
+    "README.ja.rdoc", "README.rdoc"
+  ]
+  s.files = [
+    "COPYING", "ChangeLog", "DEPENDS", "Manifest.txt",
+    "README.ja.rdoc", "README.rdoc", "Rakefile", "TODO", "bin/racc",
+    "bin/racc2y", "bin/y2racc", "ext/racc/MANIFEST",
+    "ext/racc/com/headius/racc/Cparse.java", "ext/racc/cparse.c",
+    "ext/racc/depend", "ext/racc/extconf.rb", "fastcache/extconf.rb",
+    "fastcache/fastcache.c", "lib/racc.rb", "lib/racc/compat.rb",
+    "lib/racc/debugflags.rb", "lib/racc/exception.rb",
+    "lib/racc/grammar.rb", "lib/racc/grammarfileparser.rb",
+    "lib/racc/info.rb", "lib/racc/iset.rb",
+    "lib/racc/logfilegenerator.rb", "lib/racc/parser-text.rb",
+    "lib/racc/parser.rb", "lib/racc/parserfilegenerator.rb",
+    "lib/racc/pre-setup", "lib/racc/sourcetext.rb",
+    "lib/racc/state.rb", "lib/racc/statetransitiontable.rb",
+    "lib/racc/static.rb", "misc/dist.sh", "rdoc/en/NEWS.en.rdoc",
+    "rdoc/en/grammar.en.rdoc", "rdoc/ja/NEWS.ja.rdoc",
+    "rdoc/ja/command.ja.html", "rdoc/ja/debug.ja.rdoc",
+    "rdoc/ja/grammar.ja.rdoc", "rdoc/ja/index.ja.html",
+    "rdoc/ja/parser.ja.rdoc", "rdoc/ja/usage.ja.html",
+    "sample/array.y", "sample/array2.y", "sample/calc-ja.y",
+    "sample/calc.y", "sample/conflict.y", "sample/hash.y",
+    "sample/lalr.y", "sample/lists.y", "sample/syntax.y",
+    "sample/yyerr.y", "setup.rb", "tasks/doc.rb", "tasks/email.rb",
+    "test/assets/cadenza.y", "test/assets/cast.y",
+    "test/assets/chk.y", "test/assets/conf.y",
+    "test/assets/csspool.y", "test/assets/digraph.y",
+    "test/assets/echk.y", "test/assets/edtf.y", "test/assets/err.y",
+    "test/assets/error_recovery.y", "test/assets/expect.y",
+    "test/assets/firstline.y", "test/assets/huia.y",
+    "test/assets/ichk.y", "test/assets/intp.y",
+    "test/assets/journey.y", "test/assets/liquor.y",
+    "test/assets/machete.y", "test/assets/macruby.y",
+    "test/assets/mailp.y", "test/assets/mediacloth.y",
+    "test/assets/mof.y", "test/assets/namae.y", "test/assets/nasl.y",
+    "test/assets/newsyn.y", "test/assets/noend.y",
+    "test/assets/nokogiri-css.y", "test/assets/nonass.y",
+    "test/assets/normal.y", "test/assets/norule.y",
+    "test/assets/nullbug1.y", "test/assets/nullbug2.y",
+    "test/assets/opal.y", "test/assets/opt.y",
+    "test/assets/percent.y", "test/assets/php_serialization.y",
+    "test/assets/recv.y", "test/assets/riml.y",
+    "test/assets/rrconf.y", "test/assets/ruby18.y",
+    "test/assets/ruby19.y", "test/assets/ruby20.y",
+    "test/assets/ruby21.y", "test/assets/ruby22.y",
+    "test/assets/scan.y", "test/assets/syntax.y",
+    "test/assets/tp_plus.y", "test/assets/twowaysql.y",
+    "test/assets/unterm.y", "test/assets/useless.y",
+    "test/assets/yyerr.y", "test/bench.y", "test/helper.rb",
+    "test/infini.y", "test/regress/cadenza", "test/regress/cast",
+    "test/regress/csspool", "test/regress/edtf", "test/regress/huia",
+    "test/regress/journey", "test/regress/liquor",
+    "test/regress/machete", "test/regress/mediacloth",
+    "test/regress/mof", "test/regress/namae", "test/regress/nasl",
+    "test/regress/nokogiri-css", "test/regress/opal",
+    "test/regress/php_serialization", "test/regress/riml",
+    "test/regress/ruby18", "test/regress/ruby22",
+    "test/regress/tp_plus", "test/regress/twowaysql",
+    "test/scandata/brace", "test/scandata/gvar",
+    "test/scandata/normal", "test/scandata/percent",
+    "test/scandata/slash", "test/src.intp", "test/start.y",
+    "test/test_chk_y.rb", "test/test_grammar_file_parser.rb",
+    "test/test_racc_command.rb", "test/test_scan_y.rb",
+    "test/testscanner.rb", "web/racc.en.rhtml", "web/racc.ja.rhtml"
+  ]
   s.homepage = "http://i.loveruby.net/en/projects/racc/"
   s.licenses = ["MIT"]
   s.rdoc_options = ["--main", "README.rdoc"]
diff --git a/lib/rdoc/rdoc.gemspec b/lib/rdoc/rdoc.gemspec
index c38837241f..ca807a1412 100644
--- a/lib/rdoc/rdoc.gemspec
+++ b/lib/rdoc/rdoc.gemspec
@@ -31,8 +31,198 @@ RDoc includes the +rdoc+ and +ri+ tools for generating and displaying documentat
   s.bindir = "exe"
   s.executables = ["rdoc", "ri"]
   s.require_paths = ["lib"]
-  # for ruby core repository. It was generated by `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
-  s.files = ["CONTRIBUTING.rdoc", "CVE-2013-0256.rdoc", "ExampleMarkdown.md", "ExampleRDoc.rdoc", "Gemfile", "History.rdoc", "LEGAL.rdoc", "LICENSE.rdoc", "README.rdoc", "RI.rdoc", "Rakefile", "TODO.rdoc", "bin/console", "bin/setup", "exe/rdoc", "exe/ri", "lib/rdoc.rb", "lib/rdoc/alias.rb", "lib/rdoc/anon_class.rb", "lib/rdoc/any_method.rb", "lib/rdoc/attr.rb", "lib/rdoc/class_module.rb", "lib/rdoc/code_object.rb", "lib/rdoc/code_objects.rb", "lib/rdoc/comment.rb", "lib/rdoc/constant.rb", "lib/rdoc/context.rb", "lib/rdoc/context/section.rb", "lib/rdoc/cross_reference.rb", "lib/rdoc/encoding.rb", "lib/rdoc/erb_partial.rb", "lib/rdoc/erbio.rb", "lib/rdoc/extend.rb", "lib/rdoc/generator.rb", "lib/rdoc/generator/darkfish.rb", "lib/rdoc/generator/json_index.rb", "lib/rdoc/generator/markup.rb", "lib/rdoc/generator/pot.rb", "lib/rdoc/generator/pot/message_extractor.rb", "lib/rdoc/generator/pot/po.rb", "lib/rdoc/generator/pot/po_entry.rb", "lib/rdoc/generator/ri.rb", "lib/rdoc/generator/template/darkfish/.document", "lib/rdoc/generator/template/darkfish/_footer.rhtml", "lib/rdoc/generator/template/darkfish/_head.rhtml", "lib/rdoc/generator/template/darkfish/_sidebar_VCS_info.rhtml", "lib/rdoc/generator/template/darkfish/_sidebar_classes.rhtml", "lib/rdoc/generator/template/darkfish/_sidebar_extends.rhtml", "lib/rdoc/generator/template/darkfish/_sidebar_in_files.rhtml", "lib/rdoc/generator/template/darkfish/_sidebar_includes.rhtml", "lib/rdoc/generator/template/darkfish/_sidebar_installed.rhtml", "lib/rdoc/generator/template/darkfish/_sidebar_methods.rhtml", "lib/rdoc/generator/template/darkfish/_sidebar_navigation.rhtml", "lib/rdoc/generator/template/darkfish/_sidebar_pages.rhtml", "lib/rdoc/generator/template/darkfish/_sidebar_parent.rhtml", "lib/rdoc/generator/template/darkfish/_sidebar_search.rhtml", "lib/rdoc/generator/template/darkfish/_sidebar_sections.rhtml", "lib/rdoc/generator/template/darkfish/_sidebar_table_of_contents.rhtml", "lib/rdoc/generator/template/darkfish/class.rhtml", "lib/rdoc/generator/template/darkfish/css/fonts.css", "lib/rdoc/generator/template/darkfish/css/rdoc.css", "lib/rdoc/generator/template/darkfish/fonts/Lato-Light.ttf", "lib/rdoc/generator/template/darkfish/fonts/Lato-LightItalic.ttf", "lib/rdoc/generator/template/darkfish/fonts/Lato-Regular.ttf", "lib/rdoc/generator/template/darkfish/fonts/Lato-RegularItalic.ttf", "lib/rdoc/generator/template/darkfish/fonts/SourceCodePro-Bold.ttf", "lib/rdoc/generator/template/darkfish/fonts/SourceCodePro-Regular.ttf", "lib/rdoc/generator/template/darkfish/images/add.png", "lib/rdoc/generator/template/darkfish/images/arrow_up.png", "lib/rdoc/generator/template/darkfish/images/brick.png", "lib/rdoc/generator/template/darkfish/images/brick_link.png", "lib/rdoc/generator/template/darkfish/images/bug.png", "lib/rdoc/generator/template/darkfish/images/bullet_black.png", "lib/rdoc/generator/template/darkfish/images/bullet_toggle_minus.png", "lib/rdoc/generator/template/darkfish/images/bullet_toggle_plus.png", "lib/rdoc/generator/template/darkfish/images/date.png", "lib/rdoc/generator/template/darkfish/images/delete.png", "lib/rdoc/generator/template/darkfish/images/find.png", "lib/rdoc/generator/template/darkfish/images/loadingAnimation.gif", "lib/rdoc/generator/template/darkfish/images/macFFBgHack.png", "lib/rdoc/generator/template/darkfish/images/package.png", "lib/rdoc/generator/template/darkfish/images/page_green.png", "lib/rdoc/generator/template/darkfish/images/page_white_text.png", "lib/rdoc/generator/template/darkfish/images/page_white_width.png", "lib/rdoc/generator/template/darkfish/images/plugin.png", "lib/rdoc/generator/template/darkfish/images/ruby.png", "lib/rdoc/generator/template/darkfish/images/tag_blue.png", "lib/rdoc/generator/template/darkfish/images/tag_green.png", "lib/rdoc/generator/template/darkfish/images/transparent.png", "lib/rdoc/generator/template/darkfish/images/wrench.png", "lib/rdoc/generator/template/darkfish/images/wrench_orange.png", "lib/rdoc/generator/template/darkfish/images/zoom.png", "lib/rdoc/generator/template/darkfish/index.rhtml", "lib/rdoc/generator/template/darkfish/js/darkfish.js", "lib/rdoc/generator/template/darkfish/js/search.js", "lib/rdoc/generator/template/darkfish/page.rhtml", "lib/rdoc/generator/template/darkfish/servlet_not_found.rhtml", "lib/rdoc/generator/template/darkfish/servlet_root.rhtml", "lib/rdoc/generator/template/darkfish/table_of_contents.rhtml", "lib/rdoc/generator/template/json_index/.document", "lib/rdoc/generator/template/json_index/js/navigation.js", "lib/rdoc/generator/template/json_index/js/searcher.js", "lib/rdoc/ghost_method.rb", "lib/rdoc/i18n.rb", "lib/rdoc/i18n/locale.rb", "lib/rdoc/i18n/text.rb", "lib/rdoc/include.rb", "lib/rdoc/known_classes.rb", "lib/rdoc/markdown.kpeg", "lib/rdoc/markdown/entities.rb", "lib/rdoc/markdown/literals.kpeg", "lib/rdoc/markup.rb", "lib/rdoc/markup/attr_changer.rb", "lib/rdoc/markup/attr_span.rb", "lib/rdoc/markup/attribute_manager.rb", "lib/rdoc/markup/attributes.rb", "lib/rdoc/markup/blank_line.rb", "lib/rdoc/markup/block_quote.rb", "lib/rdoc/markup/document.rb", "lib/rdoc/markup/formatter.rb", "lib/rdoc/markup/hard_break.rb", "lib/rdoc/markup/heading.rb", "lib/rdoc/markup/include.rb", "lib/rdoc/markup/indented_paragraph.rb", "lib/rdoc/markup/list.rb", "lib/rdoc/markup/list_item.rb", "lib/rdoc/markup/paragraph.rb", "lib/rdoc/markup/parser.rb", "lib/rdoc/markup/pre_process.rb", "lib/rdoc/markup/raw.rb", "lib/rdoc/markup/regexp_handling.rb", "lib/rdoc/markup/rule.rb", "lib/rdoc/markup/to_ansi.rb", "lib/rdoc/markup/to_bs.rb", "lib/rdoc/markup/to_html.rb", "lib/rdoc/markup/to_html_crossref.rb", "lib/rdoc/markup/to_html_snippet.rb", "lib/rdoc/markup/to_joined_paragraph.rb", "lib/rdoc/markup/to_label.rb", "lib/rdoc/markup/to_markdown.rb", "lib/rdoc/markup/to_rdoc.rb", "lib/rdoc/markup/to_table_of_contents.rb", "lib/rdoc/markup/to_test.rb", "lib/rdoc/markup/to_tt_only.rb", "lib/rdoc/markup/verbatim.rb", "lib/rdoc/meta_method.rb", "lib/rdoc/method_attr.rb", "lib/rdoc/mixin.rb", "lib/rdoc/normal_class.rb", "lib/rdoc/normal_module.rb", "lib/rdoc/options.rb", "lib/rdoc/parser.rb", "lib/rdoc/parser/c.rb", "lib/rdoc/parser/changelog.rb", "lib/rdoc/parser/markdown.rb", "lib/rdoc/parser/rd.rb", "lib/rdoc/parser/ripper_state_lex.rb", "lib/rdoc/parser/ruby.rb", "lib/rdoc/parser/ruby_tools.rb", "lib/rdoc/parser/simple.rb", "lib/rdoc/parser/text.rb", "lib/rdoc/rd.rb", "lib/rdoc/rd/block_parser.ry", "lib/rdoc/rd/inline.rb", "lib/rdoc/rd/inline_parser.ry", "lib/rdoc/rdoc.rb", "lib/rdoc/require.rb", "lib/rdoc/ri.rb", "lib/rdoc/ri/driver.rb", "lib/rdoc/ri/formatter.rb", "lib/rdoc/ri/paths.rb", "lib/rdoc/ri/store.rb", "lib/rdoc/ri/task.rb", "lib/rdoc/rubygems_hook.rb", "lib/rdoc/servlet.rb", "lib/rdoc/single_class.rb", "lib/rdoc/stats.rb", "lib/rdoc/stats/normal.rb", "lib/rdoc/stats/quiet.rb", "lib/rdoc/stats/verbose.rb", "lib/rdoc/store.rb", "lib/rdoc/task.rb", "lib/rdoc/text.rb", "lib/rdoc/token_stream.rb", "lib/rdoc/tom_doc.rb", "lib/rdoc/top_level.rb", "lib/rdoc/version.rb", "rdoc.gemspec"]
+  # for ruby core repository. It was generated by
+  # `git ls-files -z`.split("\x0").each {|f| puts "    #{f.dump}," unless f.start_with?(*%W[test/ spec/ features/ .]) }
+  s.files = [
+    "CONTRIBUTING.rdoc",
+    "CVE-2013-0256.rdoc",
+    "ExampleMarkdown.md",
+    "ExampleRDoc.rdoc",
+    "Gemfile",
+    "History.rdoc",
+    "LEGAL.rdoc",
+    "LICENSE.rdoc",
+    "README.rdoc",
+    "RI.rdoc",
+    "Rakefile",
+    "TODO.rdoc",
+    "bin/console",
+    "bin/setup",
+    "exe/rdoc",
+    "exe/ri",
+    "lib/rdoc.rb",
+    "lib/rdoc/alias.rb",
+    "lib/rdoc/anon_class.rb",
+    "lib/rdoc/any_method.rb",
+    "lib/rdoc/attr.rb",
+    "lib/rdoc/class_module.rb",
+    "lib/rdoc/code_object.rb",
+    "lib/rdoc/code_objects.rb",
+    "lib/rdoc/comment.rb",
+    "lib/rdoc/constant.rb",
+    "lib/rdoc/context.rb",
+    "lib/rdoc/context/section.rb",
+    "lib/rdoc/cross_reference.rb",
+    "lib/rdoc/encoding.rb",
+    "lib/rdoc/erb_partial.rb",
+    "lib/rdoc/erbio.rb",
+    "lib/rdoc/extend.rb",
+    "lib/rdoc/generator.rb",
+    "lib/rdoc/generator/darkfish.rb",
+    "lib/rdoc/generator/json_index.rb",
+    "lib/rdoc/generator/markup.rb",
+    "lib/rdoc/generator/pot.rb",
+    "lib/rdoc/generator/pot/message_extractor.rb",
+    "lib/rdoc/generator/pot/po.rb",
+    "lib/rdoc/generator/pot/po_entry.rb",
+    "lib/rdoc/generator/ri.rb",
+    "lib/rdoc/generator/template/darkfish/.document",
+    "lib/rdoc/generator/template/darkfish/_footer.rhtml",
+    "lib/rdoc/generator/template/darkfish/_head.rhtml",
+    "lib/rdoc/generator/template/darkfish/_sidebar_VCS_info.rhtml",
+    "lib/rdoc/generator/template/darkfish/_sidebar_classes.rhtml",
+    "lib/rdoc/generator/template/darkfish/_sidebar_extends.rhtml",
+    "lib/rdoc/generator/template/darkfish/_sidebar_in_files.rhtml",
+    "lib/rdoc/generator/template/darkfish/_sidebar_includes.rhtml",
+    "lib/rdoc/generator/template/darkfish/_sidebar_installed.rhtml",
+    "lib/rdoc/generator/template/darkfish/_sidebar_methods.rhtml",
+    "lib/rdoc/generator/template/darkfish/_sidebar_navigation.rhtml",
+    "lib/rdoc/generator/template/darkfish/_sidebar_pages.rhtml",
+    "lib/rdoc/generator/template/darkfish/_sidebar_parent.rhtml",
+    "lib/rdoc/generator/template/darkfish/_sidebar_search.rhtml",
+    "lib/rdoc/generator/template/darkfish/_sidebar_sections.rhtml",
+    "lib/rdoc/generator/template/darkfish/_sidebar_table_of_contents.rhtml",
+    "lib/rdoc/generator/template/darkfish/class.rhtml",
+    "lib/rdoc/generator/template/darkfish/css/fonts.css",
+    "lib/rdoc/generator/template/darkfish/css/rdoc.css",
+    "lib/rdoc/generator/template/darkfish/fonts/Lato-Light.ttf",
+    "lib/rdoc/generator/template/darkfish/fonts/Lato-LightItalic.ttf",
+    "lib/rdoc/generator/template/darkfish/fonts/Lato-Regular.ttf",
+    "lib/rdoc/generator/template/darkfish/fonts/Lato-RegularItalic.ttf",
+    "lib/rdoc/generator/template/darkfish/fonts/SourceCodePro-Bold.ttf",
+    "lib/rdoc/generator/template/darkfish/fonts/SourceCodePro-Regular.ttf",
+    "lib/rdoc/generator/template/darkfish/images/add.png",
+    "lib/rdoc/generator/template/darkfish/images/arrow_up.png",
+    "lib/rdoc/generator/template/darkfish/images/brick.png",
+    "lib/rdoc/generator/template/darkfish/images/brick_link.png",
+    "lib/rdoc/generator/template/darkfish/images/bug.png",
+    "lib/rdoc/generator/template/darkfish/images/bullet_black.png",
+    "lib/rdoc/generator/template/darkfish/images/bullet_toggle_minus.png",
+    "lib/rdoc/generator/template/darkfish/images/bullet_toggle_plus.png",
+    "lib/rdoc/generator/template/darkfish/images/date.png",
+    "lib/rdoc/generator/template/darkfish/images/delete.png",
+    "lib/rdoc/generator/template/darkfish/images/find.png",
+    "lib/rdoc/generator/template/darkfish/images/loadingAnimation.gif",
+    "lib/rdoc/generator/template/darkfish/images/macFFBgHack.png",
+    "lib/rdoc/generator/template/darkfish/images/package.png",
+    "lib/rdoc/generator/template/darkfish/images/page_green.png",
+    "lib/rdoc/generator/template/darkfish/images/page_white_text.png",
+    "lib/rdoc/generator/template/darkfish/images/page_white_width.png",
+    "lib/rdoc/generator/template/darkfish/images/plugin.png",
+    "lib/rdoc/generator/template/darkfish/images/ruby.png",
+    "lib/rdoc/generator/template/darkfish/images/tag_blue.png",
+    "lib/rdoc/generator/template/darkfish/images/tag_green.png",
+    "lib/rdoc/generator/template/darkfish/images/transparent.png",
+    "lib/rdoc/generator/template/darkfish/images/wrench.png",
+    "lib/rdoc/generator/template/darkfish/images/wrench_orange.png",
+    "lib/rdoc/generator/template/darkfish/images/zoom.png",
+    "lib/rdoc/generator/template/darkfish/index.rhtml",
+    "lib/rdoc/generator/template/darkfish/js/darkfish.js",
+    "lib/rdoc/generator/template/darkfish/js/search.js",
+    "lib/rdoc/generator/template/darkfish/page.rhtml",
+    "lib/rdoc/generator/template/darkfish/servlet_not_found.rhtml",
+    "lib/rdoc/generator/template/darkfish/servlet_root.rhtml",
+    "lib/rdoc/generator/template/darkfish/table_of_contents.rhtml",
+    "lib/rdoc/generator/template/json_index/.document",
+    "lib/rdoc/generator/template/json_index/js/navigation.js",
+    "lib/rdoc/generator/template/json_index/js/searcher.js",
+    "lib/rdoc/ghost_method.rb",
+    "lib/rdoc/i18n.rb",
+    "lib/rdoc/i18n/locale.rb",
+    "lib/rdoc/i18n/text.rb",
+    "lib/rdoc/include.rb",
+    "lib/rdoc/known_classes.rb",
+    "lib/rdoc/markdown.kpeg",
+    "lib/rdoc/markdown/entities.rb",
+    "lib/rdoc/markdown/literals.kpeg",
+    "lib/rdoc/markup.rb",
+    "lib/rdoc/markup/attr_changer.rb",
+    "lib/rdoc/markup/attr_span.rb",
+    "lib/rdoc/markup/attribute_manager.rb",
+    "lib/rdoc/markup/attributes.rb",
+    "lib/rdoc/markup/blank_line.rb",
+    "lib/rdoc/markup/block_quote.rb",
+    "lib/rdoc/markup/document.rb",
+    "lib/rdoc/markup/formatter.rb",
+    "lib/rdoc/markup/hard_break.rb",
+    "lib/rdoc/markup/heading.rb",
+    "lib/rdoc/markup/include.rb",
+    "lib/rdoc/markup/indented_paragraph.rb",
+    "lib/rdoc/markup/list.rb",
+    "lib/rdoc/markup/list_item.rb",
+    "lib/rdoc/markup/paragraph.rb",
+    "lib/rdoc/markup/parser.rb",
+    "lib/rdoc/markup/pre_process.rb",
+    "lib/rdoc/markup/raw.rb",
+    "lib/rdoc/markup/regexp_handling.rb",
+    "lib/rdoc/markup/rule.rb",
+    "lib/rdoc/markup/to_ansi.rb",
+    "lib/rdoc/markup/to_bs.rb",
+    "lib/rdoc/markup/to_html.rb",
+    "lib/rdoc/markup/to_html_crossref.rb",
+    "lib/rdoc/markup/to_html_snippet.rb",
+    "lib/rdoc/markup/to_joined_paragraph.rb",
+    "lib/rdoc/markup/to_label.rb",
+    "lib/rdoc/markup/to_markdown.rb",
+    "lib/rdoc/markup/to_rdoc.rb",
+    "lib/rdoc/markup/to_table_of_contents.rb",
+    "lib/rdoc/markup/to_test.rb",
+    "lib/rdoc/markup/to_tt_only.rb",
+    "lib/rdoc/markup/verbatim.rb",
+    "lib/rdoc/meta_method.rb",
+    "lib/rdoc/method_attr.rb",
+    "lib/rdoc/mixin.rb",
+    "lib/rdoc/normal_class.rb",
+    "lib/rdoc/normal_module.rb",
+    "lib/rdoc/options.rb",
+    "lib/rdoc/parser.rb",
+    "lib/rdoc/parser/c.rb",
+    "lib/rdoc/parser/changelog.rb",
+    "lib/rdoc/parser/markdown.rb",
+    "lib/rdoc/parser/rd.rb",
+    "lib/rdoc/parser/ripper_state_lex.rb",
+    "lib/rdoc/parser/ruby.rb",
+    "lib/rdoc/parser/ruby_tools.rb",
+    "lib/rdoc/parser/simple.rb",
+    "lib/rdoc/parser/text.rb",
+    "lib/rdoc/rd.rb",
+    "lib/rdoc/rd/block_parser.ry",
+    "lib/rdoc/rd/inline.rb",
+    "lib/rdoc/rd/inline_parser.ry",
+    "lib/rdoc/rdoc.rb",
+    "lib/rdoc/require.rb",
+    "lib/rdoc/ri.rb",
+    "lib/rdoc/ri/driver.rb",
+    "lib/rdoc/ri/formatter.rb",
+    "lib/rdoc/ri/paths.rb",
+    "lib/rdoc/ri/store.rb",
+    "lib/rdoc/ri/task.rb",
+    "lib/rdoc/rubygems_hook.rb",
+    "lib/rdoc/servlet.rb",
+    "lib/rdoc/single_class.rb",
+    "lib/rdoc/stats.rb",
+    "lib/rdoc/stats/normal.rb",
+    "lib/rdoc/stats/quiet.rb",
+    "lib/rdoc/stats/verbose.rb",
+    "lib/rdoc/store.rb",
+    "lib/rdoc/task.rb",
+    "lib/rdoc/text.rb",
+    "lib/rdoc/token_stream.rb",
+    "lib/rdoc/tom_doc.rb",
+    "lib/rdoc/top_level.rb",
+    "lib/rdoc/version.rb",
+    "rdoc.gemspec",
+  ]
   # files from .gitignore
   s.files << "lib/rdoc/rd/block_parser.rb" << "lib/rdoc/rd/inline_parser.rb" << "lib/rdoc/markdown.rb" << "lib/rdoc/markdown/literals.rb"
 
diff --git a/lib/shell/shell.gemspec b/lib/shell/shell.gemspec
index 1c27670ca4..85f117cdae 100644
--- a/lib/shell/shell.gemspec
+++ b/lib/shell/shell.gemspec
@@ -16,11 +16,24 @@ Gem::Specification.new do |spec|
   spec.homepage      = "https://github.com/ruby/shell"
   spec.license       = "BSD-2-Clause"
 
-  spec.files         = [".gitignore", ".travis.yml", "Gemfile", "LICENSE.txt", "README.md", "Rakefile", "bin/console", "bin/setup", "lib/shell.rb", "lib/shell/builtin-command.rb", "lib/shell/command-processor.rb", "lib/shell/error.rb", "lib/shell/filter.rb", "lib/shell/process-controller.rb", "lib/shell/system-command.rb", "lib/shell/version.rb", "shell.gemspec"]
+  spec.files         = [
+    "Gemfile",
+    "LICENSE.txt",
+    "README.md",
+    "Rakefile",
+    "bin/console",
+    "bin/setup",
+    "lib/shell.rb",
+    "lib/shell/builtin-command.rb",
+    "lib/shell/command-processor.rb",
+    "lib/shell/error.rb",
+    "lib/shell/filter.rb",
+    "lib/shell/process-controller.rb",
+    "lib/shell/system-command.rb",
+    "lib/shell/version.rb",
+    "shell.gemspec",
+  ]
   spec.bindir        = "exe"
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
-
-  spec.add_development_dependency "bundler"
-  spec.add_development_dependency "rake"
 end
diff --git a/lib/webrick/webrick.gemspec b/lib/webrick/webrick.gemspec
index a280c41681..5490502539 100644
--- a/lib/webrick/webrick.gemspec
+++ b/lib/webrick/webrick.gemspec
@@ -13,7 +13,50 @@ Gem::Specification.new do |s|
   s.description = "WEBrick is an HTTP server toolkit that can be configured as an HTTPS server, a proxy server, and a virtual-host server."
 
   s.require_path = %w{lib}
-  s.files =  ["lib/webrick.rb", "lib/webrick/accesslog.rb", "lib/webrick/cgi.rb", "lib/webrick/compat.rb", "lib/webrick/config.rb", "lib/webrick/cookie.rb", "lib/webrick/htmlutils.rb", "lib/webrick/httpauth.rb", "lib/webrick/httpauth/authenticator.rb", "lib/webrick/httpauth/basicauth.rb", "lib/webrick/httpauth/digestauth.rb", "lib/webrick/httpauth/htdigest.rb", "lib/webrick/httpauth/htgroup.rb", "lib/webrick/httpauth/htpasswd.rb", "lib/webrick/httpauth/userdb.rb", "lib/webrick/httpauth.rb", "lib/webrick/httpproxy.rb", "lib/webrick/httprequest.rb", "lib/webrick/httpresponse.rb", "lib/webrick/https.rb", "lib/webrick/httpserver.rb", "lib/webrick/httpservlet.rb", "lib/webrick/httpservlet/abstract.rb", "lib/webrick/httpservlet/cgi_runner.rb", "lib/webrick/httpservlet/cgihandler.rb", "lib/webrick/httpservlet/erbhandler.rb", "lib/webrick/httpservlet/filehandler.rb", "lib/webrick/httpservlet/prochandler.rb", "lib/webrick/httpservlet.rb", "lib/webrick/httpstatus.rb", "lib/webrick/httputils.rb", "lib/webrick/httpversion.rb", "lib/webrick/log.rb", "lib/webrick/server.rb", "lib/webrick/ssl.rb", "lib/webrick/utils.rb", "lib/webrick/version.rb"]
+  s.files =  [
+    "Gemfile",
+    "LICENSE.txt",
+    "README.md",
+    "Rakefile",
+    "bin/console",
+    "bin/setup",
+    "lib/webrick.rb",
+    "lib/webrick/accesslog.rb",
+    "lib/webrick/cgi.rb",
+    "lib/webrick/compat.rb",
+    "lib/webrick/config.rb",
+    "lib/webrick/cookie.rb",
+    "lib/webrick/htmlutils.rb",
+    "lib/webrick/httpauth.rb",
+    "lib/webrick/httpauth/authenticator.rb",
+    "lib/webrick/httpauth/basicauth.rb",
+    "lib/webrick/httpauth/digestauth.rb",
+    "lib/webrick/httpauth/htdigest.rb",
+    "lib/webrick/httpauth/htgroup.rb",
+    "lib/webrick/httpauth/htpasswd.rb",
+    "lib/webrick/httpauth/userdb.rb",
+    "lib/webrick/httpproxy.rb",
+    "lib/webrick/httprequest.rb",
+    "lib/webrick/httpresponse.rb",
+    "lib/webrick/https.rb",
+    "lib/webrick/httpserver.rb",
+    "lib/webrick/httpservlet.rb",
+    "lib/webrick/httpservlet/abstract.rb",
+    "lib/webrick/httpservlet/cgi_runner.rb",
+    "lib/webrick/httpservlet/cgihandler.rb",
+    "lib/webrick/httpservlet/erbhandler.rb",
+    "lib/webrick/httpservlet/filehandler.rb",
+    "lib/webrick/httpservlet/prochandler.rb",
+    "lib/webrick/httpstatus.rb",
+    "lib/webrick/httputils.rb",
+    "lib/webrick/httpversion.rb",
+    "lib/webrick/log.rb",
+    "lib/webrick/server.rb",
+    "lib/webrick/ssl.rb",
+    "lib/webrick/utils.rb",
+    "lib/webrick/version.rb",
+    "webrick.gemspec",
+  ]
   s.required_ruby_version = ">= 2.3.0"
 
   s.authors = ["TAKAHASHI Masayoshi", "GOTOU YUUZOU", "Eric Wong"]