[Jah-yee]

Summary

Fixes issue #432 — the documentation example in docs/use.rst uses the old TatSu grammar syntax @@grammar[Calc] which should be @@grammar::Calc.

Changes

• docs/use.rst line 49: @@grammar[Calc] → @@grammar::Calc

Verification

The correct TatSu v2 grammar syntax uses double colon (::) for the @@grammar directive.

Thanks to the issue reporter for identifying this documentation error!

[Jah-yee]

The docs/use.rst grammar example still uses the pre-v2 directive syntax @@grammar[Calc], which is only valid in TatSu v1 grammars — on the current v2 parser the bracket form is not accepted, so the example as written does not run.

This PR changes the single line to the v2 form @@grammar::Calc, matching the syntax used by the other grammars in the repository's own test suite and docs. The change is one line in one file, with no code or parser changes.

It addresses the documentation error reported in issue #432.

If you would rather the v1 syntax stay in the docs for historical reference, or if the snippet needs an accompanying note about the v1 -> v2 migration, say which and I will adjust the same commit.