Revisions to 'any role' term description

related to validator/validator#1425 and #436

cc @stevefaulkner @sideshowbarker 

as per my comment in #436, here is part of the update I had planned to do to help address this.  

it is also related to #358, but does NOT close that issue completely.

I'm leaving in place the updates that Mike made in the merged PR, but likely will need to revise that column later on as well, so those specific call outs may be moved or changed in the future.

Any further changes we would like to see to this text to help here?

Author: scottaohara

index.html

@@ -168,7 +168,7 @@ ARIA semantics that extend and diverge from HTML
         attribute, allowing for an aural UI that will match the visual presentation of the control.
       p>
       <p>
-        In the following example, a `button` allows for a user to toggle the state of a 
+        In the following example, a `button` element allows for a user to toggle the state of a 
         setting within a web application. The `aria-pressed` attribute is used to 
         augment the `button` element. When in the "pressed" state that information can be
         exposed to users of assistive technologies.
@@ -341,10 +341,9 @@ 
         (role, states, and properties) given in the cell in  the second column of the same row. 
         The third cell in each row defines the ARIA `role` values and `aria-*` attributes which authors MAY specify
         on the element. Where a cell in the third column includes the term <dfn><strong>Anystrong> `role`dfn>
-        it indicates that any `role` value apart from the <a>implicit ARIA semanticsa> `role` value,
-        MAY be used, <span class="addition">unless it is the `generic` role or a role 
-        <a href="#docconformance-deprecated">deprecated by ARIAa>. 
-        The `generic` role and roles deprecated by ARIA SHOULD NOT be used by authorsspan>. 
+        it indicates that any `role` value <span class="addition correction">MAY be used on the element. However, 
+        it is NOT RECOMMENDED for authors to specify the implicit role of the element, the `generic` role, or a role 
+        <a href="#docconformance-deprecated">deprecated by ARIAa> on these elements.span> 
         If a cell in the third column includes the term <dfn><strong>No `role`strong>dfn> it indicates 
         that authors MUST NOT overwrite the implicit ARIA semantics, or native semantics of the HTML element. 
       p>