PIE810 autofix changes raw strings to backslashes

[JelleZijlstra]

Start with this code:

if x.startswith("a") or x.startswith("b") or re.match(r"a\.b", x):
    pass

Ruff correctly complains that I should use a single .startswith() call.

Run Ruff's autofix for PIE810:

if x.startswith(("a", "b")) or re.match("a\\.b", x):
    pass

And now my string is not raw any more.

[charliermarsh]

👍 This is a specific instance of a general problem (#7799), though we may want to fix this case specifically since it's common for this to contain strings.