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

2020/burton/.entry.json

@@ -62,7 +62,7 @@
 	    "inventory_order" : 150,
 	    "OK_to_edit" : true,
 	    "display_as" : "text",
-	    "display_via_github" : false,
+	    "display_via_github" : true,
 	    "entry_text" : "test suite comparison data"
 	},
 	{

2020/burton/index.html

@@ -224,7 +224,7 @@ display strange results with more than one argument.</p>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/burton/try.sh">try.sh</a> - how to run</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/burton/check_be.sh">check_be.sh</a> - test suite support file</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/burton/check_le.sh">check_le.sh</a> - test suite support file</li>
-<li><a href="correct">correct</a> - test suite comparison data</li>
+<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/burton/correct">correct</a> - test suite comparison data</li>
 </ul>
 <h2 id="secondary-files">Secondary files</h2>
 <ul>