Fix documentation for .val()

See:
#828
jquery/jquery#2562
timmywil/jquery@4319c27

Author: aried3r

entries/val.xml

@@ -11,7 +11,7 @@
     </signature>
     <desc>Get the current value of the first element in the set of matched elements.</desc>
     <longdesc>
-      <p>The <code>.val()</code> method is primarily used to get the values of form elements such as <code>input</code>, <code>select</code> and <code>textarea</code>. When the first element in the collection is a <code>select-multiple</code> (i.e., a <code>select</code> element with the <code>multiple</code> attribute set), it returns an array containing the value of each selected option, or <code>null</code> if no options are selected. When called on an empty collection, it returns <code>undefined</code>.</p>
+      <p>The <code>.val()</code> method is primarily used to get the values of form elements such as <code>input</code>, <code>select</code> and <code>textarea</code>. When the first element in the collection is a <code>select-multiple</code> (i.e., a <code>select</code> element with the <code>multiple</code> attribute set), it returns an array containing the value of each selected option, or an empty array if no options are selected. When called on an empty collection, it returns <code>undefined</code>.</p>
       <p>For selects and checkboxes, you can also use the <a href="/selected-selector/">:selected</a> and <a href="/checked-selector/">:checked</a> selectors to get at values, for example:</p>
       <pre><code>
 // Get the value from a dropdown select
@@ -42,7 +42,7 @@ $.valHooks.textarea = {
       <code><![CDATA[
 function displayVals() {
   var singleValues = $( "#single" ).val();
-  var multipleValues = $( "#multiple" ).val() || [];
+  var multipleValues = $( "#multiple" ).val();
   $( "p" ).html( "<b>Single:</b> " + singleValues +
     " <b>Multiple:</b> " + multipleValues.join( ", " ) );
 }
@@ -115,8 +115,8 @@ $( "input" )
       <added>1.4</added>
       <argument name="function" type="Function">
         <argument name="index" type="Integer" />
-        <argument name="value" type="String" />     
-        <return type="String" />         
+        <argument name="value" type="String" />
+        <return type="String" />
         <desc>A function returning the value to set. <code>this</code> is the current element. Receives the index position of the element in the set and the old value as arguments.</desc>
       </argument>
     </signature>