string.c: consistent paragraph mode with IO
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57184 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
string.c: consistent paragraph mode with IO
include newlines which separate paragraphs, so that it will be
consistent with IO#each_line.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57184 b2dd03c8-39d4-4d8f-98ff-823fe69b080e