Improve config snippets in code exclusion docs

[allanlewis]

This PR makes some improvements to the code snippets in the "Excluding code from coverage.py" docs.

[nedbat]

TIL that single- and double-quotes have different semantics. I would rather use single quotes for all strings instead of mixing the styles.

Also, make sure the cog process that produces the files still works properly. You need to run make cogdoc to be sure.

[nedbat]

Thanks. Looks like there are also places in config.rst to fix.

[nedbat]

Or, let me know if you'd like me to take care of that.

[allanlewis]

Or, let me know if you'd like me to take care of that.

If you have time, that would be great! Otherwise I'll try to get back to this later in the week.

[allanlewis]

I found some time - the CI commands are passing locally now.

[nedbat]

Thanks. Let me know when you are done with it. Do you want to put all the exclusions in single quotes for consistency?

[allanlewis]

Do you want to put all the exclusions in single quotes for consistency?

Sure, I guess that makes sense - whichever of us finds the time first 🙂

[allanlewis]

Do you want to put all the exclusions in single quotes for consistency?

Sure, I guess that makes sense - whichever of us finds the time first 🙂

Done - GTM?