* proc.c: [DOC] rdoc code formatting


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42480 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* NEWS: [DOC] typo in example reported by @moretea
  https://github.com/ruby/ruby/commit/a39e724#commitcomment-3831489


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42481 b2dd03c8-39d4-4d8f-98ff-823fe69b080e