* remove trailing spaces.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40433 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* string.c: Document String#setbyte return value by @gjmurakami-10gen
  [Fixes GH-294]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40434 b2dd03c8-39d4-4d8f-98ff-823fe69b080e