scratch/emoji 1d0d1f9: Add doc string

[Lars Ingebrigtsen]

branch: scratch/emoji
commit 1d0d1f90ccc33e70b2dbbb2d068178a6d8f24a27
Author: Lars Ingebrigtsen <larsi@gnus.org>
Commit: Lars Ingebrigtsen <larsi@gnus.org>

    Add doc string
---
 lisp/play/emoji.el | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lisp/play/emoji.el b/lisp/play/emoji.el
index 2209625..ee0e816 100644
--- a/lisp/play/emoji.el
+++ b/lisp/play/emoji.el
@@ -112,6 +112,8 @@ when the command was issued."
 
 ;;;###autoload
 (defun emoji-composition-name (glyph)
+  "Say what the name of the composed grapheme cluster GLYPH is.
+If it's not known, this function returns nil."
   (require 'emoji-labels)
   (gethash glyph emoji--names))