Update zdiffstore.md

LiorKogan · web-flow · commit 48ca7c8a6ba1 · 2024-03-31T08:41:23.000+03:00
diff --git a/commands/zdiffstore.md b/commands/zdiffstore.md
@@ -4,7 +4,7 @@ specified by `numkeys`.
 
 Keys that do not exist are considered to be empty sets.
 
-If `destination` already exists, it is overwritten.
+If `destination` already exists, it is overwritten (when the difference is nonempty) or deleted (when the difference is empty)
 
 @examples
 
