Fixing UP032 when string is formatted with an element selected from a dict literal introduces a syntax error

[lshug]

Fix for rule UP032 tried to replace instance of "some string literal".format with equivalent f-strings, by converting the string literal intro an f-string and placing the argument expression of format directly into the curly braces inside the f-string. This can cause a syntax error due to not all argument expressions being valid contents of curly braces within an f-string (at least until Python 3.12, where f-string parsing rules were updated, but I haven't checked). Specifically, f-strings such as f"{{0: 1}[0]}" are not valid.

Snippet to reproduce:

"{}".format({0: 1}[0])

command:
ruff snippet.py --select UP032 --isolated --fix

Ruff version: ruff 0.1.8

Colab reproducing the issue:
https://colab.research.google.com/drive/1SHvTSAXxDeAoamaeOLe8nwatab4uyyM-?usp=sharing

[charliermarsh]

Thanks!

[charliermarsh]

Fixed in the next release.