status -s: respect the status.relativePaths option

Otherwise, 'status' and 'status -s' in a subdir would produce different
names.  This change is all the more important because status.relativePaths
is on by default.

Signed-off-by: Michael J Gruber <git@drmicha.warpmail.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-status.txt

@@ -114,8 +114,8 @@ compatibility) and `color.status.<slot>` configuration variables
 to colorize its output.
 
 If the config variable `status.relativePaths` is set to false, then all
-paths shown in the long format are relative to the repository root, not
-to the current directory.
+paths shown are relative to the repository root, not to the current
+directory.
 
 If `status.submodulesummary` is set to a non zero number or true (identical
 to -1 or an unlimited number), the submodule summary will be enabled for

builtin-commit.c

@@ -1059,6 +1059,8 @@ int cmd_status(int argc, const char **argv, const char *prefix)
 
 	switch (status_format) {
 	case STATUS_FORMAT_SHORT:
+		if (s.relative_paths)
+			s.prefix = prefix;
 		short_print(&s, null_termination);
 		break;
 	case STATUS_FORMAT_PORCELAIN: