Internal Error when formatting python 3.12 f-string with same quotes inside and out.

[jfrost-mo]

Describe the bug

Black crashes when trying to format code containing a string inside an f-string that uses the same type of quotes. This is valid syntax as of python 3.12.

To Reproduce

For example, take this code:

#! /usr/bin/env python3

print(f"{"a"}")

And run it with these arguments:

$ black --verbose --target-version py312 source.py

The resulting error is:

Identified `/` as project root containing a file system root.
Found input source: "net/home/h02/jfrost/blacktest/source.py"
Traceback (most recent call last):
  File "/data/users/jfrost/conda/envs/cset-dev/lib/python3.12/site-packages/black/__init__.py", line 837, in reformat_one
    if changed is not Changed.CACHED and format_file_in_place(
                                         ^^^^^^^^^^^^^^^^^^^^^
  File "/data/users/jfrost/conda/envs/cset-dev/lib/python3.12/site-packages/black/__init__.py", line 879, in format_file_in_place
    dst_contents = format_file_contents(
                   ^^^^^^^^^^^^^^^^^^^^^
  File "/data/users/jfrost/conda/envs/cset-dev/lib/python3.12/site-packages/black/__init__.py", line 1005, in format_file_contents
    dst_contents = format_str(src_contents, mode=mode, lines=lines)
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/data/users/jfrost/conda/envs/cset-dev/lib/python3.12/site-packages/black/__init__.py", line 1156, in format_str
    dst_contents = _format_str_once(src_contents, mode=mode, lines=lines)
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/data/users/jfrost/conda/envs/cset-dev/lib/python3.12/site-packages/black/__init__.py", line 1170, in _format_str_once
    src_node = lib2to3_parse(src_contents.lstrip(), mode.target_versions)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/data/users/jfrost/conda/envs/cset-dev/lib/python3.12/site-packages/black/parsing.py", line 89, in lib2to3_parse
    raise exc from None
black.parsing.InvalidInput: Cannot parse: 3:10: print(f"{"a"}")
error: cannot format source.py: Cannot parse: 3:10: print(f"{"a"}")

Oh no! 💥 💔 💥
1 file failed to reformat.

Expected behavior

The code is successfully formatted.

Environment

• Black's version: black, 23.11.0 (compiled: no)
• OS and Python version: Linux (RHEL7), Python 3.12.0

Additional context

[hauntsaninja]

Duplicate of #3746