Fixed typo

tool/sync_default_gems.rb

@@ -109,7 +109,7 @@ def sync_default_gems(gem)
     cp_r("#{upstream}/rdoc.gemspec", "lib/rdoc")
     cp_r("#{upstream}/exe/rdoc", "libexec")
     cp_r("#{upstream}/exe/ri", "libexec")
-    rm_rf(%w[lib/rdoc/markdown.kpeg lib/rdoc/markdown/literals.kpeg lib/rdoc/rd/block_pager.ry lib/rdoc/rd/inline_parser.ry])
+    rm_rf(%w[lib/rdoc/markdown.kpeg lib/rdoc/markdown/literals.kpeg lib/rdoc/rd/block_parser.ry lib/rdoc/rd/inline_parser.ry])
     `git checkout lib/rdoc/.document`
   when "reline"
     rm_rf(%w[lib/reline lib/reline.rb test/reline])