[iagno] Improve help.

[Arnaud B. <arnaudb src gnome org>]

commit 3e5f9cea5bbfbe60b9567fd29f74a6cac4d13e77
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Sun Jul 5 23:03:50 2020 +0200

    Improve help.
    
    See gnome-taquin#11 and gnome-taquin!11.

 help/C/play.page | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/help/C/play.page b/help/C/play.page
index 6eac9d4..afc1a95 100644
--- a/help/C/play.page
+++ b/help/C/play.page
@@ -69,7 +69,7 @@
         <p>To show possible moves, select a tile where there is already a piece, whatever its color is. 
Alternatively, you might want to <link xref="highlights#highlight-playable-tiles">highlight playable 
tiles</link>.</p>
       </item>
       <item>
-        <p>You can always undo your move. For that, use the <keyseq><key>Ctrl</key><key>Z</key></keyseq> 
keys sequence.</p>
+        <p>You can always undo your move. For that, use <keyseq><key>Ctrl</key><key>Z</key></keyseq>.</p>
       </item>
     </steps>