ruby/rubygem-ruby_parser: Wrap README at 72 columns.

Signed-off-by: B. Watson <yalhcru@gmail.com>

ruby/rubygem-ruby_parser/README

@@ -1,3 +1,4 @@
-ruby_parser (RP) is a ruby parser written in pure ruby (utilizing racc–which
-does by default use a C extension). RP's output is the same as ParseTree's
-output: s-expressions using ruby's arrays and base types.
+ruby_parser (RP) is a ruby parser written in pure ruby (utilizing
+racc–which does by default use a C extension). RP's output is the
+same as ParseTree's output: s-expressions using ruby's arrays and base
+types.