Dhruv Manilawala 69b8136463 Avoid curly brace escape in f-string format spec (#7780) ...

## Summary

This PR fixes a bug in the lexer for f-string format spec where it would
consider the `{{` (double curly braces) as an escape pattern.

This is not the case as evident by the
[PEP](https://peps.python.org/pep-0701/#how-to-produce-these-new-tokens)
as well but I missed the part:

> [..]
> * **If in “format specifier mode” (see step 3), an opening brace ({)
or a closing brace (}).**
> * If not in “format specifier mode” (see step 3), an opening brace ({)
or a closing brace (}) that is not immediately followed by another
opening/closing brace.

## Test Plan

Add a test case to verify the fix and update the snapshot.

fixes: #7778

2023-10-03 19:38:03 +05:30

..

src

Avoid curly brace escape in f-string format spec (#7780)

2023-10-03 19:38:03 +05:30

build.rs

Pull in RustPython parser (#6099)

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

Cargo.toml

Use crates.io unicode_names2 0.6.0 (#6478)

2023-10-02 18:17:38 -04:00