url: do not match on //

Double-slash comments are not paths so do not match on them.

src/config/url.zig

@@ -75,7 +75,7 @@ const scheme_url_branch =
     no_trailing_punctuation;
 
 const rooted_or_relative_path_prefix =
-    \\(?:\.\.\/|\.\/|(?<!\w)~\/|(?:[\w][\w\-.]*\/)*(?<!\w)\$[A-Za-z_]\w*\/|\.[\w][\w\-.]*\/|(?<![\w~])\/)
+    \\(?:\.\.\/|\.\/|(?<!\w)~\/|(?:[\w][\w\-.]*\/)*(?<!\w)\$[A-Za-z_]\w*\/|\.[\w][\w\-.]*\/|(?<![\w~\/])\/(?!\/))
 ;
 
 // Branch 2: Absolute paths and dot-relative paths (/, ./, ../).
@@ -472,6 +472,9 @@ test "url regex" {
         "foo$BAR/baz.txt",
         // ~ should not match mid-word
         "foo~/bar.txt",
+        // double-slash comments are not paths
+        "// foo bar",
+        "//foo",
     };
     for (no_match_cases) |input| {
         var result = re.search(input, .{});