Merge branch 'nd/dwim-wildcards-as-pathspecs'

A heuristic to help the "git <cmd> <revs> <pathspec>" command line
convention to catch mistyped paths is to make sure all the non-rev
parameters in the later part of the command line are names of the
files in the working tree, but that means "git grep $str -- \*.c"
must always be disambiguated with "--", because nobody sane will
create a file whose name literally is asterisk-dot-see.  Loosen the
heuristic to declare that with a wildcard string the user likely
meant to give us a pathspec.

* nd/dwim-wildcards-as-pathspecs:
  pathspec: avoid the need of "--" when wildcard is used

setup.c

@@ -140,7 +140,9 @@ int check_filename(const char *prefix, const char *arg)
 		if (arg[2] == '\0') /* ":/" is root dir, always exists */
 			return 1;
 		name = arg + 2;
-	} else if (prefix)
+	} else if (!no_wildcard(arg))
+		return 1;
+	else if (prefix)
 		name = prefix_filename(prefix, strlen(prefix), arg);
 	else
 		name = arg;