[Docs] Content in left sidebar cannot be extracted by gettext builder

[hwhsu1231]

Problem Description

The current content in the left sidebar of the Requests documentation:

is generated from sidebarlogo.html or sidebarintro.html:

requests/docs/_templates/sidebarintro.html

Lines 12 to 34 in ef439eb

	<p>
	Requests is an elegant and simple HTTP library for Python, built for
	human beings.
	</p>
	<h3>Useful Links</h3>
	<ul>
	<li><a href="{{ pathto('user/quickstart') }}">Quickstart</a></li>
	<li><a href="{{ pathto('user/advanced') }}">Advanced Usage</a></li>
	<li><a href="{{ pathto('api') }}">API Reference</a></li>
	<li><a href="{{ pathto('community/updates') + '#release-history' }}">Release History</a></li>
	<li><a href="{{ pathto('dev/contributing') }}">Contributors Guide</a></li>
	<p></p>
	<li><a href="{{ pathto('community/recommended') }}">Recommended Packages and Extensions</a></li>
	<p></p>
	<li><a href="https://github.com/psf/requests">Requests @ GitHub</a></li>
	<li><a href="https://pypi.org/project/requests/">Requests @ PyPI</a></li>
	<li><a href="https://github.com/psf/requests/issues">Issue Tracker</a></li>
	</ul>

requests/docs/_templates/sidebarlogo.html

Lines 6 to 29 in ef439eb

	<p>
	Requests is an elegant and simple HTTP library for Python, built for
	human beings. You are currently looking at the documentation of the
	development release.
	</p>
	<h3>Useful Links</h3>
	<ul>
	<li><a href="{{ pathto('user/quickstart') }}">Quickstart</a></li>
	<li><a href="{{ pathto('user/advanced') }}">Advanced Usage</a></li>
	<li><a href="{{ pathto('api') }}">API Reference</a></li>
	<li><a href="{{ pathto('community/updates') + '#release-history' }}">Release History</a></li>
	<li><a href="{{ pathto('dev/contributing') }}">Contributors Guide</a></li>
	<p></p>
	<li><a href="{{ pathto('community/recommended') }}">Recommended Packages and Extensions</a></li>
	<p></p>
	<li><a href="https://github.com/psf/requests">Requests @ GitHub</a></li>
	<li><a href="https://pypi.org/project/requests/">Requests @ PyPI</a></li>
	<li><a href="https://github.com/psf/requests/issues">Issue Tracker</a></li>
	</ul>

While the sphinx-build -b gettext command can extract translatable strings from .rst or .md files, strings within Jinja templates cannot be extracted unless it is wrapped in {{ _('XXX') }} or {% trans %}XXX{% endtrans %}.

[nateprewitt]

Thanks for reporting this, @hwhsu1231! I've added #7354 which should simplify this path and add wrappers for any future i18n work.