76ad528d32
Detect Python-style numeric grouping syntax in format strings (e.g. `{x:,}`)
and emit a clear diagnostic explaining that it is not supported in Rust.
This helps users coming from Python understand the error without exposing
the full set of valid Rust format specifiers.
Signed-off-by: Usman Akinyemi <usmanakinyemi202@gmail.com>
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| lib.rs | ||
| tests.rs | ||