remove unused patch label

bin/generate

@@ -33,6 +33,7 @@ is_ignored() {
                 ;;
             *)
                 case "$_name" in $_pattern) return 0 ;; esac
+                case "$_rel" in $_pattern/*) return 0 ;; esac
                 ;;
         esac
     done < "$IGNORE_FILE"
@@ -53,12 +54,12 @@ find "$CORE" -not -path "$CORE/.git/*" -type f | sort | while read -r dst_file;
     if [ -f "$src_file" ]; then
         if ! diff -q "$src_file" "$dst_file" > /dev/null 2>&1; then
             mkdir -p "$(dirname "$patch_file")"
-            diff -u "$src_file" "$dst_file" > "$patch_file" || true
+            diff -u --label "a/$rel" --label "b/$rel" "$src_file" "$dst_file" > "$patch_file" || true
             echo "  Modified: $rel"
         fi
     else
         mkdir -p "$(dirname "$patch_file")"
-        diff -u /dev/null "$dst_file" > "$patch_file" || true
+        diff -u --label /dev/null --label "b/$rel" /dev/null "$dst_file" > "$patch_file" || true
         echo "  New: $rel"
     fi
 done
@@ -72,7 +73,7 @@ find "$SING_BOX" -not -path "$SING_BOX/.git/*" -type f | sort | while read -r sr
 
     if [ ! -f "$dst_file" ]; then
         mkdir -p "$(dirname "$patch_file")"
-        diff -u "$src_file" /dev/null > "$patch_file" || true
+        diff -u --label "a/$rel" --label /dev/null "$src_file" /dev/null > "$patch_file" || true
         echo "  Deleted: $rel"
     fi
 done