rdoc: suppress warnings in eval
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57548 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
rdoc: suppress warnings in eval
text may contain warnings, which are useless to check if
parseable. merge rdoc/rdoc#440.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57548 b2dd03c8-39d4-4d8f-98ff-823fe69b080e