refactor: clean up various refactorings

[kkirsche]

1. Use contextlib.suppress rather than empty except
2. Prefer f-strings to .format and +-based concatenation for improved performance.
3. Remove empty elif via refactoring.
4. Use yield from instead of yield for 15–20% performance gain (on average)
5. Generate list() rather than iteration
6. Prefer generators to looped iteration

[kkirsche]

Oops, accidentally applied a named expression. I'll fix that

[sigmavirus24]

Thanks for the effort but we do not accept arbitrary refactorings of numerous disparate places in the code that aren't related. This tends to invite floods if other questionable large scale refactorings. The refactoring is usually largely subjective and unsolicited.