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43883b7a15
## Summary
This PR fixes a bug to disallow f-strings in match pattern literal.
```
literal_pattern ::= signed_number
| signed_number "+" NUMBER
| signed_number "-" NUMBER
| strings
| "None"
| "True"
| "False"
| signed_number: NUMBER | "-" NUMBER
```
Source:
https://docs.python.org/3/reference/compound_stmts.html#grammar-token-python-grammar-literal_pattern
Also,
```console
$ python /tmp/t.py
File "/tmp/t.py", line 4
case "hello " f"{name}":
^^^^^^^^^^^^^^^^^^
SyntaxError: patterns may only match literals and attribute lookups
```
## Test Plan
Update existing test case and accordingly the snapshots. Also, add a new
test case to verify that the parser does raise an error.
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| .. | ||
| src | ||
| build.rs | ||
| Cargo.toml | ||