Format your Erlang modules.
Add the following to your rebar.config
{plugins, [{erl_tidy_prv_fmt, ".*", {git, "git://github.com/tsloughter/erl_tidy.git", {branch, "master"}}}]}.
And run:
$ rebar3 fmt
Run rebar3 help fmt
to learn about formatting options.
You also may specify options in your rebar.config
like so:
{fmt_opts, [
{auto_list_comp, false},
{keep_unused, true}
]}.