konsti 94b68f201b Fix stylist indentation with a formfeed (#7489) ...

**Summary** In python, a formfeed is technically undefined behaviour
(https://docs.python.org/3/reference/lexical_analysis.html#indentation):
> A formfeed character may be present at the start of the line; it will
be ignored for
> the indentation calculations above. Formfeed characters occurring
elsewhere in the
> leading whitespace have an undefined effect (for instance, they may
reset the space
> count to zero).

In practice, they just reset the indentation:


df8b3a46a7/Parser/tokenizer.c (L1819-L1821)
a41bb2733f/crates/ruff_python_parser/src/lexer.rs (L664-L667)

The stylist didn't handle formfeeds previously and would produce invalid
indents. The remedy is to cut everything before a form feed.

Checks box for
https://github.com/astral-sh/ruff/issues/7455#issuecomment-1722458825

**Test Plan** Unit test for the stylist and a regression test for the
rule

2023-09-19 12:01:16 +02:00

..

src

Fix stylist indentation with a formfeed (#7489)

2023-09-19 12:01:16 +02:00

Cargo.toml

Pull in RustPython parser (#6099)

2023-07-27 09:29:11 +00:00