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Include f-string prefixes in quote-stripping utilities (#5039)

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Mentioned here:
https://github.com/astral-sh/ruff/pull/4853#discussion_r1217560348.

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https://gist.github.com/charliermarsh/8ecc4e55bc87d51dc27340402f33b348.
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Charlie Marsh 2023-06-12 18:25:47 -04:00 • committed by GitHub
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1 changed files with 125 additions and 8 deletions
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133
crates/ruff_python_ast/src/str.rs
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@ -1,23 +1,140 @@
use ruff_text_size::{TextLen, TextRange};
/// Includes all permutations of `r`, `u`, `f`, and `fr` (`ur` is invalid, as is `uf`). This
/// includes all possible orders, and all possible casings, for both single and triple quotes.
///
/// See: <https://docs.python.org/3/reference/lexical_analysis.html#string-and-bytes-literals>
#[rustfmt::skip]
const TRIPLE_QUOTE_STR_PREFIXES: &[&str] = &[
"u\"\"\"", "u'''", "r\"\"\"", "r'''", "U\"\"\"", "U'''", "R\"\"\"", "R'''", "\"\"\"", "'''",
"FR\"\"\"",
"Fr\"\"\"",
"fR\"\"\"",
"fr\"\"\"",
"RF\"\"\"",
"Rf\"\"\"",
"rF\"\"\"",
"rf\"\"\"",
"FR'''",
"Fr'''",
"fR'''",
"fr'''",
"RF'''",
"Rf'''",
"rF'''",
"rf'''",
"R\"\"\"",
"r\"\"\"",
"R'''",
"r'''",
"F\"\"\"",
"f\"\"\"",
"F'''",
"f'''",
"U\"\"\"",
"u\"\"\"",
"U'''",
"u'''",
"\"\"\"",
"'''",
];
#[rustfmt::skip]
const SINGLE_QUOTE_STR_PREFIXES: &[&str] = &[
"u\"", "u'", "r\"", "r'", "U\"", "U'", "R\"", "R'", "\"", "'",
"FR\"",
"Fr\"",
"fR\"",
"fr\"",
"RF\"",
"Rf\"",
"rF\"",
"rf\"",
"FR'",
"Fr'",
"fR'",
"fr'",
"RF'",
"Rf'",
"rF'",
"rf'",
"R\"",
"r\"",
"R'",
"r'",
"F\"",
"f\"",
"F'",
"f'",
"U\"",
"u\"",
"U'",
"u'",
"\"",
"'",
];
/// Includes all permutations of `b` and `rb`. This includes all possible orders, and all possible
/// casings, for both single and triple quotes.
///
/// See: <https://docs.python.org/3/reference/lexical_analysis.html#string-and-bytes-literals>
#[rustfmt::skip]
pub const TRIPLE_QUOTE_BYTE_PREFIXES: &[&str] = &[
"br'''", "rb'''", "bR'''", "Rb'''", "Br'''", "rB'''", "RB'''", "BR'''", "b'''", "br\"\"\"",
"rb\"\"\"", "bR\"\"\"", "Rb\"\"\"", "Br\"\"\"", "rB\"\"\"", "RB\"\"\"", "BR\"\"\"", "b\"\"\"",
"BR\"\"\"",
"Br\"\"\"",
"bR\"\"\"",
"br\"\"\"",
"RB\"\"\"",
"Rb\"\"\"",
"rB\"\"\"",
"rb\"\"\"",
"BR'''",
"Br'''",
"bR'''",
"br'''",
"RB'''",
"Rb'''",
"rB'''",
"rb'''",
"B\"\"\"",
"b\"\"\"",
"B'''",
"b'''",
];
#[rustfmt::skip]
pub const SINGLE_QUOTE_BYTE_PREFIXES: &[&str] = &[
"br'", "rb'", "bR'", "Rb'", "Br'", "rB'", "RB'", "BR'", "b'", "br\"", "rb\"", "bR\"", "Rb\"",
"Br\"", "rB\"", "RB\"", "BR\"", "b\"", "B\"",
"BR\"",
"Br\"",
"bR\"",
"br\"",
"RB\"",
"Rb\"",
"rB\"",
"rb\"",
"BR'",
"Br'",
"bR'",
"br'",
"RB'",
"Rb'",
"rB'",
"rb'",
"B\"",
"b\"",
"B'",
"b'",
];
#[rustfmt::skip]
const TRIPLE_QUOTE_SUFFIXES: &[&str] = &[
"\"\"\"",
"'''",
];
#[rustfmt::skip]
const SINGLE_QUOTE_SUFFIXES: &[&str] = &[
"\"",
"'",
];
const TRIPLE_QUOTE_SUFFIXES: &[&str] = &["\"\"\"", "'''"];
const SINGLE_QUOTE_SUFFIXES: &[&str] = &["\"", "'"];
/// Strip the leading and trailing quotes from a string.
/// Assumes that the string is a valid string literal, but does not verify that the string