What if here and above we used something like this:

```jinja
{% trans start_tag='<a href="' + release.get_bug_search_url() + '">' end_tag='</a>' %}
If interested, please see the {{ start_tag }}complete list of changes{{ end_tag }} in this release.
{% endtrans %}
```

Then in the bug list block above the same string could be used like so:

```jinja
{% trans start_tag='<button type="submit">' end_tag='</button>' %}
If interested, please see the {{ start_tag }}complete list of changes{{ end_tag }} in this release.
{% endtrans %}
```

Untested, but I think it'll work. Perhaps adding an l10n comment to aid in understanding what `start_tag` and `end_tag` are. I'm sure it'd make pascal and flod happier.