Convert all format strings to f-strings

[WaylonWalker]

Description

Converted all format strings to f-strings. With the dropped support of python 3.5- f-strings are now the preferred option for readability. With this large of a change please let me know your thoughts.

Development notes

I used flynt to convert all format strings to f-strings. I am letting CI run tests.

Checklist

• Read the contributing guidelines
• Opened this PR as a 'Draft Pull Request' if it is work-in-progress
• Updated the documentation to reflect the code changes
• Added a description of this change and added my name to the list of supporting contributions in the RELEASE.md file
• Added tests to cover my changes

Notice

• I acknowledge and agree that, by checking this box and clicking "Submit Pull Request":

• I submit this contribution under the Apache 2.0 license and represent that I am entitled to do so on behalf of myself, my employer, or relevant third parties, as applicable.

• I certify that (a) this contribution is my original creation and / or (b) to the extent it is not my original creation, I am authorised to submit this contribution on behalf of the original creator(s) or their licensees.

• I certify that the use of this contribution as authorised by the Apache 2.0 license does not violate the intellectual property rights of anyone else.

[deepyaman]

If this is to happen, does it make sense to:

• Add a note in the contributing guidelines saying that f-strings should be used over format calls (don't know if it makes sense to explain why % calls are still used in tests, or just let lint handle that); and/or
• Enforce f-strings over format in lint (relevant thread/comment)

[lorenabalan]

If this is to happen, does it make sense to:

• Add a note in the contributing guidelines saying that f-strings should be used over format calls (don't know if it makes sense to explain why % calls are still used in tests, or just let lint handle that); and/or

Yeah we could make a note in the style guidelines. 🤷‍♀️ Although we've not been very diligent with detailing that section. 😅

• Enforce f-strings over format in lint (relevant thread/comment)

That looks like a pretty involved plugin, and we'd probably only use the one feature. Personally, I wouldn't make it a blocking thing using precommit, given it's just a style preference.

[lorenabalan]

Awesome!