Add about.html footer with link to source CMD

Author: yawnoc

app/src/main/assets/about.cmd

@@ -11,6 +11,11 @@
       overflow-wrap: break-word;
       padding: 0.5em;
     }
+    footer {
+      border-top: 2px solid black;
+      margin-top: 1.5em;
+      padding-top: 0.75em;
+    }
     h1 {
       font-size: 1.6em;
       margin-top: 0.3em;
@@ -88,6 +93,11 @@ Licensed under Apache-2.0, see \Apache-2.0. \+
 ----
 
 
+<footer>
+  This page's [CMD] source: [`about.cmd`]
+</footer>
+
+
 @@[stroke]
   https://github.com/stroke-input/stroke-input-android
 @@
@@ -121,5 +131,14 @@ Licensed under Apache-2.0, see \Apache-2.0. \+
     tree/2663656870e92c0dcbe891590681815ebb509c05
 @@
 
+@@[CMD]
+  https://github.com/conway-markdown/conway-markdown
+@@
+@@[`about.cmd`]
+  https://github.com/stroke-input/stroke-input-android/\
+    blob/master/\
+    app/src/main/assets/about.cmd
+@@
+
 {: \GPL-3.0-only : b<https://www.gnu.org/licenses/> :}
 {: \Apache-2.0 : b<https://www.apache.org/licenses/LICENSE-2.0.html> :}

app/src/main/assets/about.html

@@ -10,6 +10,11 @@
 overflow-wrap: break-word;
 padding: 0.5em;
 }
+footer {
+border-top: 2px solid black;
+margin-top: 1.5em;
+padding-top: 0.75em;
+}
 h1 {
 font-size: 1.6em;
 margin-top: 0.3em;
@@ -75,5 +80,8 @@ <h3><a href="https://github.com/stroke-input/stroke-input-font">Stroke Input Key
 ©&nbsp;2015 Google and others<br>
 Licensed under Apache-2.0, see &lt;<a href="https://www.apache.org/licenses/LICENSE-2.0.html">https://www.apache.org/licenses/LICENSE-2.0.html</a>&gt;.<br>
 </p>
+<footer>
+This page's <a href="https://github.com/conway-markdown/conway-markdown">CMD</a> source: <a href="https://github.com/stroke-input/stroke-input-android/blob/master/app/src/main/assets/about.cmd"><code>about.cmd</code></a>
+</footer>
 </body>
 </html>