sequencer: do not translate command names

When action_name is used to denote a command `git %s` do not translate
since command names are never translated.

Suggested-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Michael J Gruber <git@grubix.eu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

sequencer.c

@@ -2422,7 +2422,7 @@ static int read_and_refresh_cache(struct repository *r,
 	if (repo_read_index(r) < 0) {
 		rollback_lock_file(&index_lock);
 		return error(_("git %s: failed to read the index"),
-			_(action_name(opts)));
+			action_name(opts));
 	}
 	refresh_index(r->index, REFRESH_QUIET|REFRESH_UNMERGED, NULL, NULL, NULL);
 
@@ -2430,7 +2430,7 @@ static int read_and_refresh_cache(struct repository *r,
 		if (write_locked_index(r->index, &index_lock,
 				       COMMIT_LOCK | SKIP_IF_UNCHANGED)) {
 			return error(_("git %s: failed to refresh the index"),
-				_(action_name(opts)));
+				action_name(opts));
 		}
 	}