Git completion with aliases

git_completion.bash

######## git_completion.bash ######## (from Chris J. file suggestion)
complete -o bashdefault -o default -o nospace -F _git git 2>/dev/null \
	|| complete -o default -o nospace -F _git git

## Just added this line below, it works
complete -o default -o nospace -F _git_checkout gch



######## /usr/local/etc/bash_completion.d/git_completion.bash ######## (from brew install bash-completion)
__git_complete ()
{
	local wrapper="__git_wrap${2}"
	eval "$wrapper () { __git_func_wrap $2 ; }"
	complete -o bashdefault -o default -o nospace -F $wrapper $1 2>/dev/null \
		|| complete -o default -o nospace -F $wrapper $1

## This does NOT work, error displayed below
	complete -o bashdefault -o default -o nospace -F _git_checkout gch 2>/dev/null \
		|| complete -o default -o nospace -F _git_checkout gch
}

$ gch ma(tab) ...
$ gch ma-bash: [: 1: unary operator expected
-bash: [: 1: unary operator expected