[Nikhil-4404]

Description

An empty glossary definition is already ignored when an abbreviation occurs
in an element's text. After an inline element, the same abbreviation is
incorrectly wrapped in an empty-title <abbr> element.

For example:

import markdown
from markdown.extensions.abbr import AbbrExtension

markdown.markdown('*word* HTML', extensions=[AbbrExtension(glossary={'HTML': ''})])

Actual output:

<p><em>word</em> <abbr title="">HTML</abbr></p>

Expected output:

<p><em>word</em> HTML</p>

Apply the existing nonempty-definition check to element tails as well. Add a
regression with empty and nonempty glossary definitions before and after an
emphasis element, and an unreleased changelog entry.

The new regression failed before the fix. All 31 abbreviation tests pass
afterward. python -m unittest discover tests reports 1,138 tests run, OK,
with 52 skipped on Windows / CPython 3.14.0. Optional Pygments and Tidy
dependencies were not installed. Changed-file Flake8 passes. Full Flake8
reports four unchanged E201/E202 findings in postprocessors.py:90, also
reproduced from the base source.

AI Assistance Disclosure

• No AI tools were used in preparing this PR.

• AI tools were used and I have disclosed which ones, and have fully reviewed and verified their output.

  OpenAI Codex generated the proposed fix, regression test, changelog entry,
  proposed commit message and this draft description. The submitter must
  personally review and
  understand the changes before checking the declaration above.

  AI tools were used to assist with the following:

  • Code
  • Code Comments
  • Documentation
  • Changelog Entry
  • Commit Message
  • The Description Above
  • Other: ______________

Checklist

• This PR follows the contribution guidelines.
• The code follows the Code Style Guide.
• The commit message follows the Commit Message Style Guide.
• I have added or updated relevant docs, including release notes if applicable which follow the Documentation Style Guide.
• I have added or updated relevant tests.
• I have not requested, and will not request, an automated AI review for this PR.

[waylan]

You have some unmet requirements according to the unchecked items. If you can't be bothered to follow our guidelines, then why should we be bothered to review your submission?

[Nikhil-4404]

Thanks for pointing this out. I’ve reviewed the changes and corrected the checklist. The changelog merge conflict is also resolved