Adds description of the date filters format

[vdusek]

closes #3825
https://pulp.plan.io/issues/3825

[pulpbot]

Can one of the admins verify this patch?

[codecov]

Codecov Report

Merging #3572 into master will increase coverage by 0.11%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #3572      +/-   ##
==========================================
+ Coverage    58.2%   58.32%   +0.11%     
==========================================
  Files          59       59              
  Lines        2467     2474       +7     
==========================================
+ Hits         1436     1443       +7     
  Misses       1031     1031

Impacted Files	Coverage Δ
pulpcore/pulpcore/app/viewsets/repository.py	70.8% <100%> (+0.18%)	⬆️
pulpcore/pulpcore/app/viewsets/custom_filters.py	59.25% <100%> (+11.64%)	⬆️
pulpcore/pulpcore/app/viewsets/task.py	76.56% <100%> (ø)	⬆️

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[dkliban]

Please update the commit message with both the URL to the issue and the 'closes #' or 'fixes #'. You can see an example at the end of this section[0] of docs.

[0] https://docs.pulpproject.org/dev-guide/contributing/branching.html#commit-messages

[vdusek]

Understand, thanks, fixed.

[dralley]

@daviddavis @dkliban Wouldn't it be better to add support for this upstream?

django-filters already has help_text for some fields, just not all of them.

[dkliban]

I approve. Though I do encourage you to see about contributing this feature to upstream project.

[daviddavis]

Actually, I think it would be a good idea to try to submit this upstream. 👍 from me.

[vdusek]

Ok, I opened PR on django-filters - carltongibson/django-filter#961.

[daviddavis]

I'm going to wait a couple more days for a response on carltongibson/django-filter#961 and if there's none, I'll merge this.

[daviddavis]

No response from upstream. Merging.