fix typos

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43266 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
get rid of a garbage character

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43267 b2dd03c8-39d4-4d8f-98ff-823fe69b080e