Unable to translate the content of not_found_subject from 404 template page

[rffontenelle]

readthedocs.org/readthedocs/templates/errors/404/include_error_message.html

Lines 4 to 7 in 0580934

	{% blocktrans trimmed with project_slug=project.slug %}
	You are browsing the documentation of <code>{{ project_slug }}</code>.
	The {{ not_found_subject }} you are looking for was not found.
	{% endblocktrans %}

Let me show an example of Brazilian Portuguese translation:

This message is extracted as the following to the message catalog (po file):

readthedocs.org/readthedocs/locale/pt_BR/LC_MESSAGES/django.po

Lines 4338 to 4345 in 0580934

	#: templates/errors/404/include_error_message.html:4
	#, python-format
	msgid ""
	"You are browsing the documentation of <code>%(project_slug)s</code>. The "
	"%(not_found_subject)s you are looking for was not found."
	msgstr ""
	"Você está navegando na documentação de <code>%(project_slug)s</code>. O "
	"%(not_found_subject)s que você está procurando não foram encontrados."

Here is how I see it in Sphinx documentation, translated to pt-br (example):

Você está navegando na documentação de sphinx-pt-br. O documentation page que você está procurando não foram encontrados.

Notice how {{ not_found_subject }} is replaced with the value documentation page, which is not available for translation in the aforementioned message catalog.

[humitos]

Thanks for reporting this. It seems it's missing the variable in the with from the blocktrans 👍🏼

[rffontenelle]

I don't know the possible values here, but I would like to ask to be careful with the gender of the value of not_found_subject.

I translated this message considering the male gender as I thought the value was from:

readthedocs.org/readthedocs/proxito/exceptions.py

Lines 51 to 54 in 0580934

	template_name = "errors/404/dns.html"
	not_found_subject = pgettext_lazy(
	_not_found_subject_translation_context, "matching DNS record"
	)

However, "documentation page" is female in my language (in Spanish as well, I believe), which resulted in a awful translation.

So even if not_found_subject's value is marked as translatable, one could still face a hard time to translate different possible genders in a single string.