Update article.md

Adding some mention of implicit `<tbody>` element. Comes up later in Modifying the Document task #10 solution.

Author: paroche

Diff for: 2-ui/1-document/03-dom-navigation/article.md

@@ -285,7 +285,7 @@ Tables are a great example of that, and represent a particularly important case:
 **The `<table>`** element supports (in addition to the given above) these properties:
 - `table.rows` -- the collection of `<tr>` elements of the table.
 - `table.caption/tHead/tFoot` -- references to elements `<caption>`, `<thead>`, `<tfoot>`.
-- `table.tBodies` -- the collection of `<tbody>` elements (can be many according to the standard).
+- `table.tBodies` -- the collection of `<tbody>` elements (can be many according to the standard, but there will always be at least one -- even if it is not in the source HTML, the browser will put it in the DOM).
 
 **`<thead>`, `<tfoot>`, `<tbody>`** elements provide the `rows` property:
 - `tbody.rows` -- the collection of `<tr>` inside.