Each measure of a general nature hereafter adopted, other than an ordinance of general application limited to a single occasion, wherever practicable, shall be of a form reenacting, revising, supplementing, or amending an appropriate title, chapter, or section of this code of ordinances. The ordinance, when so adopted, shall become part of this code as though included in its original enactment, and shall constitute a repealer of any previous section or sections intended to be replaced thereby.