Added newline char

Author: aosingh

dbt/include/oracle/macros/columns.sql

@@ -64,4 +64,4 @@
       alter table {{ relation }} add {{ adapter.check_and_quote_identifier(column.name, model.columns) }} {{ column.data_type }}
     {% endcall %}
   {% endfor %}
-{% endmacro %}
+{% endmacro %}