changes to improve the general format of markdown files

1994/tvr/README.md

@@ -59,7 +59,7 @@ where `altmode` `1` - `4` correspond to mode `0` - `3` in the original entry and
 `altmode 0` calculates Mandelbrot/Julian sets correctly.
 
 
-## Alternate try:
+### Alternate try:
 
 ```sh
 ./try.alt.color.sh			# for colour displays

1994/tvr/index.html

@@ -161,7 +161,7 @@ code</a> below.</p>
 <div class="sourceCode" id="cb6"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb6-1"><a href="#cb6-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./tvr.alt</span> altmode screensize/2 <span class="op">&lt;</span> colormapfile</span></code></pre></div>
 <p>where <code>altmode</code> <code>1</code> - <code>4</code> correspond to mode <code>0</code> - <code>3</code> in the original entry and
 <code>altmode 0</code> calculates Mandelbrot/Julian sets correctly.</p>
-<h2 id="alternate-try">Alternate try:</h2>
+<h3 id="alternate-try">Alternate try:</h3>
 <div class="sourceCode" id="cb7"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb7-1"><a href="#cb7-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./try.alt.color.sh</span>          <span class="co"># for colour displays</span></span>
 <span id="cb7-2"><a href="#cb7-2" aria-hidden="true" tabindex="-1"></a><span class="ex">./try.alt.bw.sh</span>         <span class="co"># for Black &amp; White displays</span></span></code></pre></div>
 <h2 id="judges-remarks">Judges’ remarks:</h2>