What rule do you want to change?

no-missing-atx-heading-space

What change do you want to make?

Generate more warnings

How do you think the change should be implemented?

A new default behavior

Example code

#Heading 1#

What does the rule currently do for this code?

Currently, the rule only reports an error for #Heading (missing space after opening hash) but ignores 1# (missing space before closing hash).

What will the rule do after it's changed?

After the change, the rule will report errors for missing space before closing hash

Participation

• I am willing to submit a pull request to implement this change.

Additional comments

This behavior aligns with Markdownlint's implementation (rule MD018), which also checks for spaces both before and after hash sequences in ATX headings.