Incorrect highlighting of comments in Yaml blocks

[jamescherti]

Issue

Strings that start with the pound character (#) are not properly highlighted when they are part of a YAML block created using either (|) or (>):

(Screenshot: yaml-mode / Emacs)

This bug can make it difficult for users to distinguish between comments that are part of a block and those that are not.

Expected result

It is expected that all strings within a YAML block should be uniformly highlighted, regardless of whether they begin with the pound (#) character or not:

(Screenshot from another editor)

Environment

• Emacs version: 28.2-r6
• Yaml-mode version: master branch, commit ref b153150 (March 29, 2023)