fix docs

docs/website/docs/general-usage/incremental-loading.md

@@ -334,7 +334,7 @@ You can configure the literal used to indicate an active record with `active_rec
 )
 def dim_customer():
     ...
-...
+```
 
 #### Example: use your own row hash
 By default, `dlt` generates a row hash based on all columns provided by the resource and stores it in `_dlt_id`. You can use your own hash instead by specifying `row_version_column_name` in the `write_disposition` dictionary. You might already have a column present in your resource that can naturally serve as row hash, in which case it's more efficient to use those pre-existing hash values than to generate new artificial ones. This option also allows you to use hashes based on a subset of columns, in case you want to ignore changes in some of the columns. When using your own hash, values for `_dlt_id` are randomly generated.