formatted lerna completion and used helper function

clean_files.txt

@@ -71,6 +71,7 @@ completion/available/jungle.completion.bash
 completion/available/knife.completion.bash
 completion/available/kontena.completion.bash
 completion/available/kubectl.completion.bash
+completion/available/lerna.completion.bash
 completion/available/minikube.completion.bash
 completion/available/npm.completion.bash
 completion/available/packer.completion.bash

completion/available/lerna.completion.bash

@@ -1,6 +1,8 @@
-#!/bin/bash
-# Lerna autocompletion.
-function _lerna_completions() {
+# shellcheck shell=bash
+cite "about-completion"
+about-completion "lerna(javascript project manager tool) completion"
+
+function __lerna_completion() {
 	local cur compls
 
 	# The currently-being-completed word.
@@ -16,4 +18,4 @@ function _lerna_completions() {
 	# Tell complete what stuff to show.
 	COMPREPLY=($(compgen -W "$compls" -- "$cur"))
 }
-complete -o default -F _lerna_completions lerna
+complete -o default -F __lerna_completion lerna