Make :indeterminate normative

Author: fantasai

selectors4/Overview.html

@@ -1935,18 +1935,24 @@ <h3 id=checked><span class=secno>10.2. </span> The :checked pseudo-class</h3>
    in which case the <code>:checked</code> pseudo-class would no longer
    apply.
 
+  <div class=example>
+   <p>An unchecked checkbox can be selected by using the <code>:not()</code>
+    pseudo-class:
+
+   <pre>:not(:checked)</pre>
+
+   <pre>
+  </pre>
+  </div>
+
   <h3 id=indeterminate><span class=secno>10.3. </span> The :indeterminate
    pseudo-class</h3>
 
-  <p>Radio and checkbox elements can be toggled by the user, but are
-   sometimes in an indeterminate state, neither checked nor unchecked. This
-   can be due to an element attribute, or DOM manipulation.
-
-  <p>A future version of this specification may introduce an
-   <code>:indeterminate</code> pseudo-class that applies to such elements.
-   While the <code>:indeterminate</code> pseudo-class is dynamic in nature,
-   and is altered by user action, since it can also be based on the presence
-   of an element attribute, it applies to all media.
+  <p>Radio and checkbox elements can be toggled between checked and unchecked
+   states, but are sometimes in an indeterminate state, neither checked nor
+   unchecked. The <code>:indeterminate</code> pseudo-class applies to such
+   elements. Like the <code>:checked<code> pseudo-class, it applies to all
+   media.</code></code>
 
   <p>Components of a radio-group initialized with no pre-selected choice are
    an example of :indeterminate state.

selectors4/Overview.src.html

@@ -1484,24 +1484,25 @@ <h3 id=checked>
   elements in which case the <code>:checked</code> pseudo-class would no
   longer apply.
 
+  <div class="example">
+    <p>An unchecked checkbox can be selected by using the <code>:not()</code>
+    pseudo-class:
+    <pre>:not(:checked)<pre>
+  </div>
+
 <h3 id=indeterminate>
 The :indeterminate pseudo-class</h3>
 
-  <p>Radio and checkbox elements can be toggled by the user, but are
-  sometimes in an indeterminate state, neither checked nor unchecked.
-  This can be due to an element attribute, or DOM manipulation.</p>
-
-  <p>A future version of this specification may introduce an
-  <code>:indeterminate</code> pseudo-class that applies to such elements.
-  While the <code>:indeterminate</code> pseudo-class is dynamic in
-  nature, and is altered by user action, since it can also be based on
-  the presence of an element attribute, it applies to all media.</p>
+  <p>Radio and checkbox elements can be toggled between checked and
+  unchecked states, but are sometimes in an indeterminate state,
+  neither checked nor unchecked.
+  The <code>:indeterminate</code> pseudo-class applies to such elements.
+  Like the <code>:checked<code> pseudo-class, it applies to all media.</p>
 
   <p>Components of a radio-group initialized with no pre-selected choice
   are an example of :indeterminate state.</p>
   </div>
 
-
 <h2 id=structural-pseudos>
 Structural pseudo-classes</h2>