Clarified String#tr rdoc. (RickHull)
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@31898 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Clarified String#tr rdoc. (RickHull)
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@31898 b2dd03c8-39d4-4d8f-98ff-823fe69b080e