internal/lsp: fix typo on license year

Change-Id: I3cd4a55c633fd7a154d35fd3669e13562295242b
Reviewed-on: https://go-review.googlesource.com/c/tools/+/181897
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
diff --git a/internal/lsp/tests/tests.go b/internal/lsp/tests/tests.go
index b838931..9454bf3 100644
--- a/internal/lsp/tests/tests.go
+++ b/internal/lsp/tests/tests.go
@@ -1,4 +1,4 @@
-// Copyright 2019q The Go Authors. All rights reserved.
+// Copyright 2019 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.