Use lexical-binding in morse.el and studly.el and add tests

* lisp/play/morse.el: Use lexical-binding.
* lisp/play/studly.el: Use lexical-binding.
* test/lisp/play/morse-tests.el: New file.
* test/lisp/play/studly-tests.el: New file.

2 files changed, 2 insertions, 2 deletions

diff --git a/lisp/play/morse.el b/lisp/play/morse.el
index 1f62ec3c03c..f4989716556 100644
--- a/lisp/play/morse.el
+++ b/lisp/play/morse.el
@@ -1,4 +1,4 @@
-;;; morse.el --- convert text to morse code and back
+;;; morse.el --- convert text to morse code and back  -*- lexical-binding: t -*-
 
 ;; Copyright (C) 1995, 2001-2019 Free Software Foundation, Inc.
 
diff --git a/lisp/play/studly.el b/lisp/play/studly.el
index ff1bf03e118..c4b32414bd4 100644
--- a/lisp/play/studly.el
+++ b/lisp/play/studly.el
@@ -1,4 +1,4 @@
-;;; studly.el --- StudlyCaps (tm)(r)(c)(xxx)
+;;; studly.el --- StudlyCaps (tm)(r)(c)(xxx)  -*- lexical-binding: t -*-
 
 ;;; This is in the public domain, since it was distributed
 ;;; by its author in 1986 without a copyright notice.