Golang log/slog: example for slog.Group uses internal package

The example at https://pkg.go.dev/log/slog#Group does not compile as it uses an internal package ("log/slog/internal/slogtest").

Output:

package play
    prog.go:5:2: use of internal package log/slog/internal/slogtest not allowed

The example is located here: https://github.com/golang/go/blob/master/src/log/slog/example_test.go

It also looks like the examples allow the use of internal packages which might be worth a more general design discussion.

Comment From: seankhliao

cc @jba

Comment From: jba

This was a deliberate decision: we preferred factoring out common code to making the examples playable. We could revisit.

/cc @adonovan

Comment From: henvic

I also agree that revisiting it would be a nice idea as a lot of people learn by using examples as references, and this might be confusing to newcomers.

Comment From: gopherbot

Change https://go.dev/cl/536215 mentions this issue: slog: factoring out code to make the examples playable

Comment From: AlekSi

That one seems to be resolved.

Comment From: seankhliao

done in CL 536215