methods.rdoc: small improvements
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58215 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
methods.rdoc: small improvements
grammar, punctuation, consistently use capitalized "Ruby".
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58215 b2dd03c8-39d4-4d8f-98ff-823fe69b080e