minor fixes

Author: iliakan

2-ui/1-document/02-dom-nodes/article.md

@@ -143,7 +143,7 @@ drawHtmlTree(node4, 'div.domtree', 690, 360);
 </script>
 
 ````warn header="Tables always have `<tbody>`"
-An interesting "special case" is tables. By the DOM specification they must have `<tbody>`, but HTML text may (officially) omit it. Then the browser creates `<tbody>` in the DOM automatically.
+An interesting "special case" is tables. By DOM specification they must have `<tbody>` tag, but HTML text may omit it. Then the browser creates `<tbody>` in the DOM automatically.
 
 For the HTML: