chore: test patch

remove this commit before merging

lake-manifest.json

@@ -1,13 +1,13 @@
 {"version": 7,
  "packagesDir": ".lake/packages",
  "packages":
- [{"url": "https://github.com/leanprover/std4",
+ [{"url": "https://github.com/fgdorais/std4",
    "type": "git",
    "subDir": null,
-   "rev": "0f6bc5b32bf5b0498902d3b5f0806c75530539d5",
+   "rev": "215e759095f20a395928f83cde116d811774e960",
    "name": "std",
    "manifestFile": "lake-manifest.json",
-   "inputRev": "main",
+   "inputRev": "nat-mul",
    "inherited": false,
    "configFile": "lakefile.lean"},
   {"url": "https://github.com/leanprover-community/quote4",

lakefile.lean

@@ -26,7 +26,7 @@ package mathlib where
 meta if get_config? doc = some "on" then -- do not download and build doc-gen4 by default
 require «doc-gen4» from git "https://github.com/leanprover/doc-gen4" @ "main"
 
-require std from git "https://github.com/leanprover/std4" @ "main"
+require std from git "https://github.com/fgdorais/std4" @ "nat-mul"
 require Qq from git "https://github.com/leanprover-community/quote4" @ "master"
 require aesop from git "https://github.com/leanprover-community/aesop" @ "master"
 require proofwidgets from git "https://github.com/leanprover-community/ProofWidgets4" @ "v0.0.24"