convert spoiler language and towards deobfuscation language

2006/monge/README.md

@@ -248,7 +248,7 @@ changing the definitions of `W`, `H` and `I` at the beginning of the code.
   parameter.
 
 
-### Spoiler
+### Deobfuscation
 
 Sure, I don't want to deprive you of the pleasure of digging
 into the infernal mess created by my corrupted mind (writing

2006/monge/index.html

@@ -553,7 +553,7 @@ numbers.</li>
 <li>There should be some way to switch from Mandelbrot to Julia with chosen
 parameter.</li>
 </ul>
-<h3 id="spoiler">Spoiler</h3>
+<h3 id="deobfuscation">Deobfuscation</h3>
 <p>Sure, I don’t want to deprive you of the pleasure of digging
 into the infernal mess created by my corrupted mind (writing
 this remark I noticed that I was ending sentences with ‘;’ instead