We should make sure that the protocol is still extensible.

This just reformats if .. else if .. else chain to make it clear we
are handling extended response from the other end.

fetch-pack.c

@@ -189,7 +189,7 @@ static int find_common(int fd[2], unsigned char *result_sha1,
 	if (!fetching)
 		return 1;
 
-	if (depth >  0) {
+	if (depth > 0) {
 		char line[1024];
 		unsigned char sha1[20];
 		int len;
@@ -202,7 +202,9 @@ static int find_common(int fd[2], unsigned char *result_sha1,
 				if (lookup_object(sha1))
 					continue;
 				register_shallow(sha1);
-			}  else if (!strncmp("unshallow ", line, 10)) {
+				continue;
+			}
+			if (!strncmp("unshallow ", line, 10)) {
 				if (get_sha1_hex(line + 10, sha1))
 					die("invalid unshallow line: %s", line);
 				if (!lookup_object(sha1))
@@ -211,8 +213,9 @@ static int find_common(int fd[2], unsigned char *result_sha1,
 				parse_object(sha1);
 				if (unregister_shallow(sha1))
 					die("no shallow found: %s", line);
-			} else
-				die("expected shallow/unshallow, got %s", line);
+				continue;
+			}
+			die("expected shallow/unshallow, got %s", line);
 		}
 	}