Revert unneeded changes

Author: lukewarlow

dom.bs

@@ -4281,7 +4281,7 @@ empty string instead, and then do as described below, switching on the interface
 
 <dl class=switch>
  <dt>{{Attr}}
- <dd><p><a>Set an existing attribute value</a> with <a>this</a>, the given value.
+ <dd><p><a>Set an existing attribute value</a> with <a>this</a> and the given value.
 
  <dt>{{CharacterData}}
  <dd><p><a>Replace data</a> with node <a>this</a>, offset 0, count <a>this</a>'s
@@ -7266,12 +7266,9 @@ method steps are to return the result of
 <a lt="get an attribute by namespace and local name">getting an attribute</a> given
 <var>namespace</var>, <var>localName</var>, and <a for=NamedNodeMap>element</a>.
 
-<p>The <dfn method for=NamedNodeMap><code>setNamedItem(<var>attr</var>)</code></dfn> method steps are
-to return the result of <a lt="set an attribute">setting an attribute</a> given <var>attr</var>,
-<a for=NamedNodeMap>element</a>.
-
-<p>The <dfn method for=NamedNodeMap><code>setNamedItemNS(<var>attr</var>)</code></dfn> method steps are
-to return the result of <a lt="set an attribute">setting an attribute</a> given <var>attr</var>,
+<p>The <dfn method for=NamedNodeMap><code>setNamedItem(<var>attr</var>)</code></dfn> and
+<dfn method for=NamedNodeMap><code>setNamedItemNS(<var>attr</var>)</code></dfn> method steps are
+to return the result of <a lt="set an attribute">setting an attribute</a> given <var>attr</var> and
 <a for=NamedNodeMap>element</a>.
 
 <p>The <dfn method for=NamedNodeMap><code>removeNamedItem(<var>qualifiedName</var>)</code></dfn>