convert spoiler language and towards deobfuscation language

2019/dogon/README.md

@@ -225,7 +225,7 @@ character juxtaposed against a very ancient one, not to mention the program
 includes some famous name dropping and documents itself as usual.
 
 
-### Further spoilers, engineering, and obfuscation galore:
+### Further deobfuscation, engineering, and obfuscation galore:
 
 Those wait for you, curious and intrepid reader, in the attached
 [apholife.c](%%REPO_URL%%/2019/dogon/apholife.c) file, which is a partially obfuscated version of the

2019/dogon/index.html

@@ -565,7 +565,7 @@ resulting <code>F</code> in hexadecimal…</p>
 <p>And yes, the layout hint involves a mix of the most trendy typographical
 character juxtaposed against a very ancient one, not to mention the program
 includes some famous name dropping and documents itself as usual.</p>
-<h3 id="further-spoilers-engineering-and-obfuscation-galore">Further spoilers, engineering, and obfuscation galore:</h3>
+<h3 id="further-deobfuscation-engineering-and-obfuscation-galore">Further deobfuscation, engineering, and obfuscation galore:</h3>
 <p>Those wait for you, curious and intrepid reader, in the attached
 <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2019/dogon/apholife.c">apholife.c</a> file, which is a partially obfuscated version of the
 program I wrote with a lot of helpful annotations and comments for myself and