Update sdiffstore.md

Author: LiorKogan

commands/sdiffstore.md

@@ -1,7 +1,7 @@
 This command is equal to `SDIFF`, but instead of returning the resulting set, it
 is stored in `destination`.
 
-If `destination` already exists, it is overwritten (when the difference is nonempty) or deleted (when the difference is empty)
+If `destination` already exists, it is overwritten (when the difference is nonempty) or deleted (when the difference is empty).
 
 @examples