/usr/share/fish/completions/cat.fish is in fish-common 2.2.0-3.
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 | complete -c cat -s A -l show-all --description "Escape all non-printing characters"
complete -c cat -s b -l number-nonblank --description "Number nonblank lines"
complete -c cat -s e --description "Escape non-printing characters except tab"
complete -c cat -s E -l show-ends --description "Display \$ at end of line"
complete -c cat -s n -l number --description "Number all lines"
complete -c cat -s s -l squeeze-blank --description "Never more than single blank line"
complete -c cat -s t --description "Escape non-printing characters except newline"
complete -c cat -s T -l show-tabs --description "Escape tab"
complete -c cat -s v --description "Escape non-printing except newline and tab"
complete -c cat -l help --description "Display help and exit"
complete -c cat -l version --description "Display version and exit"
|