Fix subset of linting rules

[smokestacklightnin]

Supersedes #2252

Applies pre-commit with Ruff rules from #2251

The description from #2252 applies here:

This PR fixes a bunch of existing lint issues that were automatically fixed by ruff --fix, in preparation for merging #2251. I've ignored a bunch of rule violations, but marked them in ruff.toml so that they can be systematically re-enabled and the violations fixed one by one. The vast majority of these changes are:

• Removing useless whitespace at the end of lines
• Making sure the end of file contains a newline
• Removing unnecessary python 2/3 compatibility __future__ imports
• Import sorting
• Replacing calls to format() with f-strings, which are faster and more expressive