ruff

a7b52a15 - [ty] Preserve distinct string literal displays without deprecated ICU data (#29206)

[ty] Preserve distinct string literal displays without deprecated ICU data (#29206) Canonical equivalence can make distinct string values look the same. ty escapes their displays to distinguish them, but the current approach relies on ICU4X's deprecated `NfcInert` property, which [ICU4X plans to remove](https://github.com/unicode-org/icu4x/issues/7892), and can escape characters that do not need escaping. Replace inertness checks with NFC checks on runs of unescaped text. When adding a character would make a run non-NFC, escape that character and continue checking after it. The resulting string literal is in NFC and evaluates to the original value, so canonically equivalent values remain distinguishable. For example, `\u212b` (the Angstrom sign) is canonically equivalent to `Å`. ty now keeps the unrelated `é` visible while still distinguishing the two values: ```py reveal_type("éÅ") # main: Literal["éÅ"] # this PR: Literal["éÅ"] reveal_type("é\u212b") # main: Literal["\xe9\u212b"] # this PR: Literal["é\u212b"] ``` The change also uses Unicode grapheme-break properties to keep characters visually separate from the quotes and escape sequences around them. It escapes the braille blank because it can look like an ordinary space.