[format] Improve readability by fixing various naming conventions / typos

[ryanrussell]

This is a large pull request attempting to improve readability issues throughout the Examples repo.

Changes to 40+ files include typos in docs, docstrings and variable names.

When a variable name was changed, I did a global grep -r var_name to ensure no dangling references were left.

Feels solid; could use a second pair of eyes before merging.

Thanks! Ryan

[FrankLeeeee]

@ryanrussell LGTM. Thanks a lot for spotting all these errors! 😃