gh-150459: Fix SyntaxError message for from x lazy import y

[sobolevn]

There's a problem with another branch of from ... import.
Because from .lazy import and from . lazy import is the same thing from the parser's point of view.

Things I've tried:

    | 'from' ('.' | '...')+ a="lazy" 'import' import_from_targets {
        RAISE_SYNTAX_ERROR_KNOWN_LOCATION(a,
            "use 'lazy from ... ' instead of 'from ... lazy import'") }

What do I suggest? Maybe we can add an exception note for from .lazy import y when ImportError is raised with a similar message?

• Issue: Improve lazy imports syntax errors #150459

[johnslavik]

❤️❤️❤️

Excellent