* numeric.c (num_step): better iteration condition for float

values;  suggested by Masahiro TANAKA <masa@ir.isas.ac.jp>.

* range.c (range_step): step (for Range#step method) <= 0 makes no
  sence, thus ArgError will be raised.

* range.c (range_each): Range#each method is special case for
  Range#step(1)

* file.c (rb_find_file): load must be done from an abolute path if
  $SAFE >= 4.

* enum.c (enum_partition): new method. [new]

* re.c (rb_reg_s_quote): quote whitespaces for /x cases.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@2420 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

file.c

@@ -2482,6 +2482,10 @@ rb_find_file(path)
 	if (file_load_ok(f)) return path;
     }
 
+    if (rb_safe_level() >= 4) {
+	rb_raise(rb_eSecurityError, "loading from non-absolute path %s", f);
+    }
+
     if (rb_load_path) {
 	int i;