This file is indexed.

/usr/share/fish/functions/fish_config.fish is in fish-common 2.4.0-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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function fish_config --description "Launch fish's web based configuration"
	# Support passing an initial tab like "colors" or "functions"
	set -l initial_tab
	if count $argv >/dev/null
		set initial_tab $argv[1]
	end
	set -x __fish_bin_dir $__fish_bin_dir
	eval (string escape $__fish_datadir/tools/web_config/webconfig.py) $initial_tab
end