cmd/doc: go doc synctest.Wait shows wrong package

[rsc]

go doc is preferring internal/synctest over testing/synctest when asked about synctest.Wait. It should only resort to internal packages if no non-internal ones can be found.

% go version
go version go1.27-devel_3ca82d4890 Fri Jun 12 10:58:22 2026 -0700 darwin/arm64
% go doc testing/synctest.Wait
package synctest // import "testing/synctest"

func Wait()
    Wait blocks until every goroutine within the current bubble, other than the
    current goroutine, is durably blocked.

    Wait must not be called from outside a bubble. Wait must not be called
    concurrently by multiple goroutines in the same bubble.

% go doc synctest.Wait
package synctest // import "internal/synctest"

func Wait()
% 

[gabyhelp]

Related Issues

• cmd/doc: package search inconsistent with methods or fields #40011
• cmd/doc: not printing package name in type query #31457 (closed)
• x/tools/cmd/godoc: show internal packages when explicitly requested #12092 (closed)
• x/pkgsite: broken link to internal type #63210
• x/tools/cmd/godoc: all std packages are treated as command #14447 (closed)
• cmd/godoc: text output displays command internals. #4861 (closed)
• cmd/doc: nearest-match package resolution not performed for type queries #18697 (closed)
• cmd/go: doc with package name broken outside modules #78896 (closed)
• cmd/doc: go doc rsc.io/quote/v3 in module mode shows wrong import path #30778 (closed)
• cmd/doc: do not respect relative import paths that match standard commands #16183 (closed)

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[goutamadwant]

@rsc I opened #80002 for this.

The change makes cmd/doc defer internal package matches for shorthand
lookups unless the query explicitly includes an internal path element.

[gopherbot]

Change https://go.dev/cl/790520 mentions this issue: cmd/doc: prefer non-internal packages in shorthand lookup