Rewording

As a separate PR, as recommended by #13450 (comment)

Note: `addTagForm` was the wrong function name, it's now called `addFormToCollection()`

Author: ThomasLandauer

form/form_collections.rst

@@ -304,14 +304,10 @@ button so you can add a new tag form (``addFormToCollection()`` will be show nex
         })
     });
 
-The ``addTagForm()`` function's job will be to use the ``data-prototype`` attribute
-to dynamically add a new form when this link is clicked. The ``data-prototype``
-HTML contains the tag ``text`` input element with a name of ``task[tags][__name__][name]``
-and id of ``task_tags___name___name``. The ``__name__`` is a little "placeholder",
-which you'll replace with a unique, incrementing number (e.g. ``task[tags][3][name]``).
-
-The actual code needed to make this all work can vary quite a bit, but here's
-one example:
+The ``data-prototype`` HTML contains the tag's ``text`` input element with a name of
+``task[tags][__name__][name]`` and id of ``task_tags___name___name``. The ``__name__``
+part is a "placeholder", which is replaced by a unique, incrementing number
+(e.g. ``task[tags][3][name]``).
 
 .. code-block:: javascript