What version of Go are you using (go version)?

1.21.0

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

N/A

What did you do?

Follow the documentation of slog.SourceKey and use it with a string value.

The constant slog.SourceKey is documented to have string values.

However, the wrapping example demonstrates that is has a *slog.Source value.

A different package used the example code to remove the directory from log lines. https://github.com/proullon/ramsql/blob/master/engine/log/log.go#L22, which my code indirectly depended on, triggering a type assertion error the error on log.

This problem exists in the [exp/slog package as well](https://pkg.go.dev/golang.org/x/exp/slog#SourceKey

What did you expect to see?

Document the type for SourceKey values as *slog.Source, which is the correct expected value.

Alternatively, the example needs to change.

What did you see instead?

SourceKey values are documented as strings. https://pkg.go.dev/log/slog#SourceKey)