fix typos [ci skip]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48428 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
add missing filename [ci skip]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48429 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
fix typos and spaces [ci skip]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48430 b2dd03c8-39d4-4d8f-98ff-823fe69b080e