Keep terminal input when triggering code reload during breakpoint

[bpicolo]

Seems to fix #1317

Would add a test but the actual bugfix that depends on this would be a pretty bizarre thing to test, not sure how that might be automated in a practical fashion. A unit test here would be pretty meaningless w/regards to the actual issue. Happy to add any test that seems appropriate though (will fix that now-broken test in a moment)

This is pretty much just how Pyramid/Django both do it, with slight recontextualizing because licensing requirements are somewhat unclear

[davidism]

Please ensure the tests pass in a clean environment with tox -e py36. This appears to be causing issues with connections in test_serving.py for some reason. https://travis-ci.org/pallets/werkzeug/jobs/385255469#L532

[davidism]

Your git config does not appear to match your GitHub profile. If you want those to match up you need to configure your name and email. After that, amend the author information to the existing commit with git commit --amend --author 'Your Name <configured@email>', then force push with git push -f.

[bpicolo]

@davidism Thanks for the feedback here. Fixed on both counts

[blueyed]

This looks similar to what Django has.
I've made an improvement over there: https://github.com/django/django/pull/11291/files
I'd appreciate feedback, and could also turn it into a PR here if you want it.