ripper.rb: fix License format [ci skip]

* ext/ripper/lib/ripper.rb: [DOC] fix format of the License
  description and the author.  patched by aycabta (Code Ahss) at
  [ruby-core:82376].  [Bug #13813]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59597 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/ripper/lib/ripper.rb

@@ -66,9 +66,9 @@ require 'ripper/sexp'
 #
 # == License
 #
-#   Ruby License.
+# Ruby License.
 #
-#                                                 Minero Aoki
-#                                         aamine@loveruby.net
-#                                       http://i.loveruby.net
+# - Minero Aoki
+# - aamine@loveruby.net
+# - http://i.loveruby.net
 class Ripper; end