Fix issues introduced in #137 (4dfdd72)
Fix issues introduced in #137 (4dfdd72)

* fix Dialyzer warning
* fix formatting

processone/rebar3,fabiankrol/rebar3,csyangchen/rebar,evnix/rebar,matwey/rebar,lpgauth/rebar,platinumthinker/rebar,lrascao/rebar3,macintux/rebar,scatterbrain/rebar,K2InformaticsGmbH/rebar,platinumthinker/rebar,kellymclaughlin/rebar3,apache/couchdb-rebar,rebar/rebar,paulo-ferraz-oliveira/rebar,heroku/rebar,CMoH/rebar,lpgauth/rebar,jacktang/rebar,shkumagai/rebar,beni55/rebar,syl20bnr/rebar,fauxsoup/rebar3,tsloughter/rebar3,bsmr-erlang/rebar,bsmr-erlang/rebar,fabiankrol/rebar3,bsmr-erlang/rebar,jbalint/rebar3,RubberCthulhu/rebar,K2InformaticsGmbH/rebar,rebar/rebar,K2InformaticsGmbH/rebar,norton/rebar,syl20bnr/rebar,benoitc/rebar3,sile/rebar3,zugolosian/rebar3,CMoH/rebar,oubiwann/rebar,macintux/rebar,matwey/rebar,platinumthinker/rebar,cloudant/couchdb-rebar,linearregression/rebar3,apache/couchdb-rebar,benoitc/rebar3,zugolosian/rebar3,dcarastan/rebar,rebar/rebar3,erlang/rebar3,paulo-ferraz-oliveira/rebar,syl20bnr/rebar,rebar/rebar,scatterbrain/rebar,surik/rebar3,sile/rebar3,norton/rebar,scatterbrain/rebar,dcarastan/rebar,evnix/rebar,shkumagai/rebar,GabrielNicolasAvellaneda/rebar,cloudant/couchdb-rebar,shkumagai/rebar,SiDen/rebar,lrascao/rebar,K2InformaticsGmbH/rebar,SiDen/rebar,walrusVision/rebar3,oubiwann/rebar,fauxsoup/rebar3,choptastic/rebar,RubberCthulhu/rebar,jacktang/rebar,surik/rebar3,beni55/rebar,norton/rebar,lpgauth/rebar,apache/couchdb-rebar,linearregression/rebar3,project-fifo/rebar3,ferd/rebar3,GabrielNicolasAvellaneda/rebar,norton/rebar3,choptastic/rebar,lrascao/rebar,SiDen/rebar,jacktang/rebar,norton/rebar,paulo-ferraz-oliveira/rebar,heroku/rebar,evnix/rebar,K2InformaticsGmbH/rebar,dcarastan/rebar,cloudant/couchdb-rebar,project-fifo/rebar3,CMoH/rebar,bsmr-erlang/rebar,csyangchen/rebar,lrascao/rebar,blt/rebar3,csyangchen/rebar,macintux/rebar,choptastic/rebar,processone/rebar3,lrascao/rebar,fishcakez/rebar3,GabrielNicolasAvellaneda/rebar,djnym/rebar3,matwey/rebar,oubiwann/rebar,matwey/rebar,lrascao/rebar,jbalint/rebar3,walrusVision/rebar3,beni55/rebar,matwey/rebar,blt/rebar3,saleyn/rebar3,rebar/rebar3,vladdu/rebar3