readline.c: $SAFE

* ext/readline/readline.c (readline_s_delete_text): $SAFE=4 is
  obsolete.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42102 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
vm_eval.c: use file argument

* vm_eval.c (eval_string_with_cref): use the given file name unless
  eval even if scope is given.  additional fix for [Bug #8436].
  based on the patch by srawlins at [ruby-core:56099] [Bug #8662].

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42103 b2dd03c8-39d4-4d8f-98ff-823fe69b080e