comments: fix misuses of "nor"

Signed-off-by: Justin Lebar <jlebar@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/remote.c b/remote.c
index 5f63d55..f43c7a9 100644
--- a/remote.c
+++ b/remote.c
@@ -1409,7 +1409,7 @@
 				/*
 				 * Remote doesn't have it, and we have no
 				 * explicit pattern, and we don't have
-				 * --all nor --mirror.
+				 * --all or --mirror.
 				 */
 				goto free_name;