500 error emails in 1.3 include misleading info at bottom

[KyleMac]

Presumably the emails are generated from the same template as the HTML pages and so they include this snippet at the bottom:

You're seeing this error because you have DEBUG = True in your Django settings file. Change that to False, and Django will display a standard 500 page.

Which is incorrect and mostly irrelevant but also misleading.

[Karen Tracey]

The proposed change in #15603 kind of "fixes" this by documenting the HTML attachment as exactly what would be seen on the DEBUG page....

[Russell Keith-Magee]

This is a problem with a new feature, so it needs to be addressed (even if it is just the documentation fix) before we cut 1.3 final.

That said, I'd rather see a proper fix, rather than just documenting it. It shouldn't be hard to use a different template, or make that part of the template optional.

[Karen Tracey]

OK, I'll look at getting that end bit suppressed appropriately...

[Karen Tracey]

In [15802]:

Fixed #15597: When formatting the debug page for inclusion in an e-mail, suppress the note about "seeing this" because DEBUG is True.

[Karen Tracey]

Sorry, forgot to thank KyleMac for report in the commit message...