change test files that do not end in .txt to view via GitHub

2012/deckmyn/.entry.json

@@ -46,7 +46,7 @@
 	    "inventory_order" : 100,
 	    "OK_to_edit" : true,
 	    "display_as" : "text",
-	    "display_via_github" : false,
+	    "display_via_github" : true,
 	    "entry_text" : "music notation"
 	},
 	{
@@ -54,7 +54,7 @@
 	    "inventory_order" : 100,
 	    "OK_to_edit" : true,
 	    "display_as" : "text",
-	    "display_via_github" : false,
+	    "display_via_github" : true,
 	    "entry_text" : "music notation"
 	},
 	{

2012/deckmyn/index.html

@@ -274,8 +274,8 @@ character nested conditional expression.</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2012/deckmyn/Makefile">Makefile</a> - entry Makefile</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2012/deckmyn/deckmyn.orig.c">deckmyn.orig.c</a> - original source</li>
 <li><a href="deckmyn.html">deckmyn.html</a> - user manual</li>
-<li><a href="example_beethoven">example_beethoven</a> - music notation</li>
-<li><a href="example_greensleeves">example_greensleeves</a> - music notation</li>
+<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2012/deckmyn/example_beethoven">example_beethoven</a> - music notation</li>
+<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2012/deckmyn/example_greensleeves">example_greensleeves</a> - music notation</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2012/deckmyn/try.sh">try.sh</a> - how to run</li>
 </ul>
 <h2 id="secondary-files">Secondary files</h2>