Following #51082, I think there is a bug with list formatting when comment start and end with /*...*/ in the current tip branch, or maybe a missing exception in the proposal since the spec still allow comment start/end with /*...*/.

What version of Go are you using (go version)?

The latest tip from playground.

Does this issue reproduce with the latest release?

No, only tip.

What did you do?

See https://go.dev/play/p/WfIdp2WQphD?v=gotip

What did you expect to see?

The list on the comment section reformated, as below

/*
testCommentSlashStart method with header and list

# Header

Here is the list,

  - a
  - b
*/

What did you see instead?

/*
testCommentSlashStart method with header and list

# Header

Here is the list,

* a
* b
*/
func testCommentSlashStart() {}