Bug report

Description

The Markdown linter reports about 1421 issues when the rule 'MD040' is enabled.

Steps to reproduce

1. In the _checks/styles/style-rules-prod change exclude_rule 'MD040' to rule 'MD040'.
2. In your terminal, run rake test:md.

Test your updates

1. Follow "Steps to reproduce" locally to get list of errors to fix.
2. Preview the HTML locally to ensure your changes did not break formatting in the resulting HTML (run rake:preview). For more information, refer to the README.

Note-->Do NOT use special keywords in your commit message.

Expected result

All the reported issues are fixed.
The rake test:md command returns No issues found.