Update doc/note/auto-formatting.md comparison link
diff --git a/doc/note/auto-formatting.md b/doc/note/auto-formatting.md
index 61f85f9..edb2b22 100644
--- a/doc/note/auto-formatting.md
+++ b/doc/note/auto-formatting.md
@@ -4,7 +4,7 @@
- Hand-written `C` code is formatted by `clang-format-9 -style=Chromium`.
- Auto-generated `C` code is formatted by [`dumbindent`](/cmd/dumbindent),
which isn't as 'pretty' in some sense, but is [substantially
- faster](https://github.com/google/wuffs/blob/a0f7059eeb022c4dec70ffae4041bcc54f666c0d/cmd/dumbindent/main.go#L32-L44),
+ faster](https://github.com/google/wuffs/blob/dd04d5541744cc73d0852dc9d8ea2fb22c7ae69d/cmd/dumbindent/main.go#L32-L44),
making the edit-compile-run cycle more productive.
- `Go` code is formatted by `gofmt`.
- `Wuffs` code is formatted by [`wuffsfmt`](/cmd/wuffsfmt).
