Manifest updates for 1993/ant and 2020/endoh2

For 1993/ant it clarifies (even though the extension of the file
probably would suggest it) that the man page is in text format.

For 2020/endoh2 there were some mistakes introduced with the renaming of
spoiler to other things.

Rebuilt the .entry.json and the index.html files for both.

Rebuilt 2020/endoh2/obfuscation/index.html.

2020/endoh2/obfuscation/index.html

@@ -396,7 +396,7 @@ chunks that is a ASCII code (65-90) followed by points data: <code>x,y,ctrl</cod
 <p>If <code>ctrl</code> is 1, the point is used as control point for quadratic <a href="https://en.wikipedia.org/wiki/Bézier_curve">bézier
 curve</a>.</p>
 <p><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/endoh2/obfuscation/code.c">code.c</a> is the main logic for the program, which has some placeholders
-for font data and something.</p>
+for font data and something else.</p>
 <p>It decompresses the font data and renders a given text by projection. It
 exploits <code>C99</code>’s <code>double complex</code> type to represent 2D points, but carefully
 coded so that it does not require any <code>math.h</code> functions; you don’t have to pass