Update sinterstore.md

Author: LiorKogan

commands/sinterstore.md

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