gopls: repair premature commit of 562248

I clicked the wrong button (twice) before including
the last round of changes. This CL adds a necessary
copyright notice, and adjusts init() and comments in
a test file.

Change-Id: Ibf5d8e4d071fb571eab910902f0bc22009f2b81c
Reviewed-on: https://go-review.googlesource.com/c/tools/+/571755
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: Robert Findley <[email protected]>

Author: pjweinbgo

gopls/internal/server/counters.go

@@ -1,3 +1,7 @@
+// Copyright 2024 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package server
 
 import "golang.org/x/telemetry/counter"

gopls/internal/test/integration/completion/completion_test.go

@@ -6,7 +6,6 @@ package completion
 
 import (
 	"fmt"
-	"log"
 	"sort"
 	"strings"
 	"testing"
@@ -260,11 +259,6 @@ func compareCompletionLabels(want []string, gotItems []protocol.CompletionItem)
 	return ""
 }
 
-func init() {
-	// useful while debugging
-	log.SetFlags(log.Lshortfile)
-}
-
 func TestUnimportedCompletion(t *testing.T) {
 	const mod = `
 -- go.mod --
@@ -1009,6 +1003,9 @@ func Join() {}
 	})
 }
 
+// show that the counters get exercised. Fortuntely a small program
+// exercises them all (except for mulit-chnage, for which see the code
+// in env.setBufferContentLocked)
 func TestCounters(t *testing.T) {
 	const files = `
 -- go.mod --