completion/git: shfmt && shellcheck

clean_files.txt

@@ -49,6 +49,7 @@ completion/available/docker-machine.completion.bash
 completion/available/docker.completion.bash
 completion/available/gcloud.completion.bash
 completion/available/gem.completion.bash
+completion/available/git.completion.bash
 completion/available/github-cli.completion.bash
 completion/available/go.completion.bash
 completion/available/helm.completion.bash

completion/available/git.completion.bash

@@ -29,6 +29,7 @@ _git_bash_completion_found=false
 for _comp_path in "${_git_bash_completion_paths[@]}"; do
 	if [[ -r "$_comp_path" ]]; then
 		_git_bash_completion_found=true
+		# shellcheck disable=SC1090 # don't follow
 		source "$_comp_path"
 		break
 	fi