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.md

@@ -9,7 +9,7 @@ If `ctrl` is 1, the point is used as control point for quadratic [bézier
 curve](https://en.wikipedia.org/wiki/Bézier_curve).
 
 [code.c](%%REPO_URL%%/2020/endoh2/obfuscation/code.c) is the main logic for the program, which has some placeholders
-for font data and something.
+for font data and something else.
 
 It decompresses the font data and renders a given text by projection.  It
 exploits `C99`'s `double complex` type to represent 2D points, but carefully