convert spoiler language and towards deobfuscation language

1994/imc/README.md

@@ -44,7 +44,7 @@ parameter or an invalid parameter is given, then 5 is assumed.  The
 maximum parameter is determined only by the amount of CPU time, virtual
 memory and display (or file) space available.
 
-### SPOILER:
+### DEOBFUSCATION:
 
 OK, so you have probably seen magic square printers before.  But what
 about one that deals with even sizes as well as odd ones, or one that

1994/imc/index.html

@@ -424,7 +424,7 @@ other functions (apart from <code>main()</code>).</p>
 parameter or an invalid parameter is given, then 5 is assumed. The
 maximum parameter is determined only by the amount of CPU time, virtual
 memory and display (or file) space available.</p>
-<h3 id="spoiler">SPOILER:</h3>
+<h3 id="deobfuscation">DEOBFUSCATION:</h3>
 <p>OK, so you have probably seen magic square printers before. But what
 about one that deals with even sizes as well as odd ones, or one that
 prints out a different one each time (or attempts to, at any rate)?</p>