* note Python 3.8 support as provisional
* Remove mentions of minor doc fixes (there are many more fixes beyond the ones mentioned here, and including them all in the release notes would add too much noise...)
As per #5620 - signals are often overlooked as a way of customising model-level behaviour. We should recommend them over admin hooks where possible, as they aren't reliant on users taking one particular path through the admin - for example, an 'add document' signal will be triggered regardless of whether a document is created through the single uploader, multiple uploader, chooser model or a scripted task, whereas a hook would not catch all of these cases.
Fixes#5539. Transifex and Django's makemessages command have validation to catch invalid placeholder variables within translated strings - for example, where the translator has translated the variable name - but these only recognise old-style `%` formatting, not the `format` method, and so it's better for us to standardise on % formatting.
To reduce the burden on translators having to re-translate these strings, only the ones using named placeholders (`"Edited page {title}"`) rather than numeric ones (`"Edited page {0}"`) have been changed - hopefully the latter give less room for error.
Also fixed some incorrect use of plurals (verbose_name vs verbose_name_plural) in snippet confirmation messages.
- Typo in readme (verb did not agree with the subject)
- Grammatical error in topics/pages
- #5364 - Update URL config code block in getting-started/integrating-into-django
Work on compatibility is ongoing while Django 3.0 is still in development; we don't want this to be misinterpreted as a statement of formal Django 3.0 support (which we can't promise until the final release)
As per https://twitter.com/SaraSoueidan/status/1177622630763028480, certain browsers apply heuristics to decide whether `<table>` elements exist for layout or data purposes, and adjust the behaviour of their accessibility features accordingly. Given that TableBlock intentionally doesn't allow markup within cells, we can be reasonably sure that any tables created with it are genuine data tables, and should therefore indicate that using `role="table"`.
Fixes#5442. Building a User object for david@torchbox.com may cause problems if a custom user model is in use, and is redundant anyhow because there's no longer a registered gravatar for that email - we should just hard-code the default blank avatar instead.
Matt Westcott