improve display_via_github and display_as values

Fixed some inconsistent use of display_via_github and display_as values.

2019/burton/index.html

@@ -222,7 +222,7 @@ This exercise left to the reader.</p>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2019/burton/prog.orig.c">prog.orig.c</a> - original source</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2019/burton/check.sh">check.sh</a> - test suite</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2019/burton/cow.sh">cow.sh</a> - an alternate implementation with a useful interface</li>
-<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2019/burton/on.one.liners.txt">on.one.liners.txt</a> - on writing an IOCCC one-liner</li>
+<li><a href="on.one.liners.txt">on.one.liners.txt</a> - on writing an IOCCC one-liner</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2019/burton/try.sh">try.sh</a> - how to run</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2019/burton/prog.clean.c">prog.clean.c</a> - version of source without compilation warnings</li>
 </ul>
@@ -234,7 +234,7 @@ This exercise left to the reader.</p>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2019/burton/README.md">README.md</a> - markdown source for this web page</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2019/burton/.entry.json">.entry.json</a> - description of entry in JSON</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2019/burton/.gitignore">.gitignore</a> - list of files that should not be committed under git</li>
-<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2019/burton/newlines">newlines</a> - more useful interface.</li>
+<li><a href="newlines">newlines</a> - more useful interface.</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2019/burton/.path">.path</a> - directory path from top directory</li>
 </ul>