Add missing word on docs (#4)

Nipodemos · simc · commit bc93fa6f8dc1 · 2019-07-24T01:48:33.000+02:00
diff --git a/docs/write.md b/docs/write.md
@@ -8,4 +8,4 @@ await box.put('name', 'Paul');
 await box.put('friends', ['Dave', 'Simon', 'Lisa']);
 ```
 
-?> Writing `null` the same as [deleting](delete.md) a value.
+?> Writing `null` is the same as [deleting](delete.md) a value.
