/usr/lib/aspell/x86_64-linux-gnu/html.amf is in libaspell15 0.60.7~20110707-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 | # HTML mode description file
MODE html
ASPELL >=0.60
MAGIC /0:256:^[ \t]*<[Hh][Tt][Mm][Ll]([ \t]*(<[^>]*>|[^<>]*))*>/htm/html
MAGIC /0:256:^[ \t]*<[h][Tt][Mm][Ll]([ \t]*(<[^>]*>|[^<>]*))*>/HTM/HTML
DESCRIPTION mode for checking HTML documents
FILTER url
FILTER html
|