fix DirectoryNotEmpty when it comes to a Non-directory file

src/core/path.c

@@ -215,7 +215,7 @@ static bool path_spec_check_good(PathSpec *s, bool initial, bool from_trigger_no
                 int k;
 
                 k = dir_is_empty(s->path);
-                good = !(k == -ENOENT || k > 0);
+                good = !(IN_SET(k, -ENOENT, -ENOTDIR) || k > 0);
                 break;
         }