Cleanup string formatting.

[knotapun]

This commit attempts to clean out old cruft, to make room for new cruft. This is clearly not the most pressing issue in the world, however I think it's far more legible.

This change consists of:

• Replacing most %-strings with f-strings.
• Cleanup a few areas where repeated string formatting logic was used, by using a loop instead.

[github-actions[bot]]

All contributors have signed the CLA ✍️ ✅
_{Posted by the CLA Assistant Lite bot.}

[knotapun]

I have read the CLA Document and I hereby sign the CLA

[knotapun]

recheck

[knotapun]

Read through the action result, and it looks like it wasn't happy about an extra line, and I forgot to wrap arguments for the SQLite call in the sample, so it did a different form of injection. Ironic. At least it failed fast?

[knotapun]

• The raise syntax is invalid here. It should be raise ValueError(f"max. code point found: {ord(max(text))}, increase limit") without the colon after ValueError.

               raise ValueError:(f"max. code point found: {ord(max(text))}, increase limit")

src/utils.py:1640

The syntax error is real, but I didn't introduce it. That's easy to fix though.

[knotapun]

Everything copilot complained about, (Except the pass thing, which it was wrong about), I fixed. I don't think the dictionary thing makes a difference speed wise, but I think it's stylistically better.

[jamie-lemon]

@knotapun Would it be possible to squash your commits here?

[knotapun]

They're now squashed into one commit. Git is my biggest weakness, sorry if this is not the appropriate way to do this.

[jamie-lemon]

Looks good to me, my "git-fu" is also pretty weak when it comes to this sort of thing!

As far as a I am concerned this PR is fine, but I think we need to spend some time double checking and testing that none of our tests are broken (which I doubt). So don't be surprised if it takes a few days :)