chore(tidy): tidy up document (#442)

Co-authored-by: miketaylr <[email protected]>

index.html

@@ -1309,8 +1309,8 @@ <h4 id="webdriver-command-set-permission">
             argument=] [=error=].
             </li>
             <li>If |parametersDict|.{{PermissionSetParameters/state}} is an inappropriate
-            [=permission state=] for any implementation-defined reason, return an
-            [=invalid argument=] [=error=].
+            [=permission state=] for any implementation-defined reason, return an [=invalid
+            argument=] [=error=].
               <p class="note">
                 For example, <a>user agents</a> that define the "midi" <a>powerful feature</a> as
                 "always on" can choose to reject a command to set the [=permission state=] to