var text/template.fmtStringerType

3 uses

	text/template (current package)
		exec.go#L690: 	fmtStringerType  = reflect.TypeOf((*fmt.Stringer)(nil)).Elem()
		exec.go#L1034: 	if !v.Type().Implements(errorType) && !v.Type().Implements(fmtStringerType) {
		exec.go#L1035: 		if v.CanAddr() && (reflect.PointerTo(v.Type()).Implements(errorType) || reflect.PointerTo(v.Type()).Implements(fmtStringerType)) {

The pages are generated with Golds v0.4.9. (GOOS=linux GOARCH=amd64)