woman-file-compression-regexp

woman-file-compression-regexp is a variable defined in `woman.el'.
Its value is

"\\.\\(g?z\\|bz2\\|xz\\)\\'"

Documentation:
Do not change this unless you are sure you know what you are doing!
Regexp used to match compressed man file extensions for which
decompressors are available and handled by auto-compression mode,
e.g. "\\.\\(g?z\\|bz2\\|xz\\)\\'" for `gzip', `bzip2', or `xz'.
Should begin with \. and end with \' and MUST NOT be optional.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 24.1 of Emacs.