Merge branch 'jk/parseopt-string-list'

A small memory leak in the command line parsing of "git blame"
has been plugged.

* jk/parseopt-string-list:
  blame: drop strdup of string literal

builtin/blame.c

@@ -2808,7 +2808,7 @@ parse_done:
 	lno = prepare_lines(&sb);
 
 	if (lno && !range_list.nr)
-		string_list_append(&range_list, xstrdup("1"));
+		string_list_append(&range_list, "1");
 
 	anchor = 1;
 	range_set_init(&ranges, range_list.nr);