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## Summary
This PR updates the parser definition to use the precise location when reporting
an invalid f-string conversion flag error.
Taking the following example code:
```python
f"{foo!x}"
```
On earlier version,
```
Error: f-string: invalid conversion character at byte offset 6
```
Now,
```
Error: f-string: invalid conversion character at byte offset 7
```
This becomes more useful when there's whitespace between `!` and the flag value
although that is not valid but we can't detect that now.
## Test Plan
As mentioned above.
|
||
|---|---|---|
| .. | ||
| lexer | ||
| snapshots | ||
| context.rs | ||
| function.rs | ||
| lexer.rs | ||
| lib.rs | ||
| parser.rs | ||
| python.lalrpop | ||
| python.rs | ||
| soft_keywords.rs | ||
| string.rs | ||
| token.rs | ||
| typing.rs | ||