improve the pull request template

[l29ah]

to simplify the mandatory summary specification

Summary

SUMMARY: None

Purpose of change

Describe the solution

Describe alternatives you've considered

Testing

Additional context

[Brian-Otten]

The old one has been driving me batty for a while now so this is appreciated.

[kevingranade]

Whoops buried.
So the reason there isn't a valid summary line in the template is so if you don't edit it, it will fail the summary checker.

I see three valid options:
There is no valid summary line in the template as it is now,.
There is a SUMMARY: None line in the template so your PR is IGNORED in the changelog unless you edit it (but then there is no example of what to do?)
There is a SECOND summary line or some other kind of poison pill that must be edited away to make the PR description pass the summary checker.

Erk's suggestion is a version of the third, it's a summary line ready for you to edit, but it's not a valid summary line. The problem there is that it is inside a comment, so if someone simply edits it in place it will pass the checker but not have a visible summary.

[l29ah]

Okay.

[kevingranade]

You did literally BOTH of the things I said not to do.