trivial change.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@23873 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

complex.c

@@ -1473,7 +1473,7 @@ string_to_c_strict(VALUE self)
  * Returns a complex which denotes the string form.  The parser
  * ignores leading whitespaces and trailing garbage.  Any digit
  * sequences can be separeted by an underscore.  Returns zero for null
- * string.
+ * or garbage string.
  *
  * For example:
  *