Merge pull request w3c#154 from dandclark/dandclark/link-to-ec-handled-inputTypes

For `beforeinput`, only pass the event to EditContext for `inputTypes` that EditContext expects to handle.
See w3c/edit-context#101.

Author: dandclark

index.html

@@ -1646,7 +1646,8 @@ <h4>
                       </li>
                       <li>For <a href=
                       "https://w3c.github.io/edit-context/#dfn-editcontext-editing-host">
-                        EditContext editing hosts</a> for all inputTypes:
+                        EditContext editing hosts</a> for <a href=
+                        "https://w3c.github.io/edit-context/#dfn-editcontext-handled-inputtype">EditContext-handled inputTypes</a>:
                         <a href=
                         "https://w3c.github.io/edit-context/#dfn-handle-input-for-editcontext">
                         Handle input for EditContext</a> given the [=editing