convert spoiler language and towards deobfuscation language

1994/schnitzi/index.html

@@ -439,7 +439,7 @@ find out why?</p>
 <p>You might also wish to redirect the output to another file,
 compile it and compare how it works to the original code.</p>
 <h2 id="authors-remarks">Author’s remarks:</h2>
-<h3 id="spoiler">SPOILER:</h3>
+<h3 id="deobfuscation">DEOBFUSCATION:</h3>
 <p>This is a program which takes any text file as input and ‘flips’
 the input file along a diagonal running from the top left corner
 down to the bottom right. In other words, the first row in the