readline.c: $SAFE 4
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42114 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
readline.c: $SAFE 4
only if level 4 is allowed. otherwise do nothing.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42114 b2dd03c8-39d4-4d8f-98ff-823fe69b080e