Improve format_warning/1 spec
Improve format_warning/1 spec

Let it handle `dial_warning()` input as well, to match what `format_warning/2` expects.
release-project/otp,mikpe/otp,falkevik/otp,cobusc/otp,RaimoNiskanen/otp,lrascao/otp,RaimoNiskanen/otp,matwey/otp,uabboli/otp,RoadRunnr/otp,RaimoNiskanen/otp,goertzenator/otp,release-project/otp,emile/otp,emile/otp,lrascao/otp,matwey/otp,erlang/otp,RoadRunnr/otp,basho/otp,bugs-erlang-org/otp,lrascao/otp,ahmedshafeeq/otp,electricimp/otp,tuncer/otp,release-project/otp,kvakvs/otp,erlang/otp,cobusc/otp,electricimp/otp,aboroska/otp,dgud/otp,uabboli/otp,isvilen/otp,bugs-erlang-org/otp,lrascao/otp,RaimoNiskanen/otp,lightcyphers/otp,RaimoNiskanen/otp,kvakvs/otp,dgud/otp,bsmr-erlang/otp,emacsmirror/erlang,bernardd/otp,emacsmirror/erlang,aboroska/otp,matwey/otp,isvilen/otp,lightcyphers/otp,emile/otp,ferd/otp,jj1bdx/otp,ahmedshafeeq/otp,mikpe/otp,ferd/otp,vinoski/otp,emacsmirror/erlang,lightcyphers/otp,jj1bdx/otp,erlang/otp,dumbbell/otp,vladdu/otp,neeraj9/otp,RoadRunnr/otp,aboroska/otp,g-andrade/otp,getong/otp,bjorng/otp,rlipscombe/otp,vladdu/otp,legoscia/otp,falkevik/otp,legoscia/otp,bjorng/otp,emacsmirror/erlang,matwey/otp,bsmr-erlang/otp,bsmr-erlang/otp,goertzenator/otp,massemanet/otp,isvilen/otp,rlipscombe/otp,vinoski/otp,falkevik/otp,isvilen/otp,fenollp/otp,tuncer/otp,vinoski/otp,uabboli/otp,lrascao/otp,basho/otp,rlipscombe/otp,cobusc/otp,matwey/otp,tuncer/otp,emacsmirror/erlang,RaimoNiskanen/otp,falkevik/otp,g-andrade/otp,bjorng/otp,ahmedshafeeq/otp,potatosalad/otp,bugs-erlang-org/otp,mikpe/otp,emacsmirror/erlang,bernardd/otp,falkevik/otp,electricimp/otp,uabboli/otp,weisslj/otp,tuncer/otp,jj1bdx/otp,electricimp/otp,saleyn/otp,emacsmirror/erlang,legoscia/otp,getong/otp,cobusc/otp,weisslj/otp,neeraj9/otp,RoadRunnr/otp,fenollp/otp,getong/otp,kvakvs/otp,ferd/otp,dumbbell/otp,electricimp/otp,basho/otp,RoadRunnr/otp,fenollp/otp,basho/otp,dumbbell/otp,goertzenator/otp,aboroska/otp,jj1bdx/otp,fenollp/otp,cobusc/otp,matwey/otp,aboroska/otp,legoscia/otp,bsmr-erlang/otp,isvilen/otp,dumbbell/otp,uabboli/otp,saleyn/otp,legoscia/otp,isvilen/otp,rlipscombe/otp,emile/otp,goertzenator/otp,ahmedshafeeq/otp,aboroska/otp,dgud/otp,dgud/otp,RaimoNiskanen/otp,neeraj9/otp,potatosalad/otp,weisslj/otp,matwey/otp,bsmr-erlang/otp,g-andrade/otp,neeraj9/otp,potatosalad/otp,weisslj/otp,neeraj9/otp,saleyn/otp,lrascao/otp,fenollp/otp,emacsmirror/erlang,dgud/otp,weisslj/otp,cobusc/otp,bugs-erlang-org/otp,dgud/otp,massemanet/otp,kvakvs/otp,rlipscombe/otp,bernardd/otp,uabboli/otp,g-andrade/otp,emacsmirror/erlang,ahmedshafeeq/otp,ferd/otp,bernardd/otp,dgud/otp,vladdu/otp,bjorng/otp,ferd/otp,g-andrade/otp,bjorng/otp,vinoski/otp,erlang/otp,basho/otp,release-project/otp,mikpe/otp,bernardd/otp,erlang/otp,bugs-erlang-org/otp,fenollp/otp,lightcyphers/otp,bsmr-erlang/otp,bjorng/otp,vladdu/otp,emile/otp,ferd/otp,getong/otp,g-andrade/otp,aboroska/otp,kvakvs/otp,rlipscombe/otp,g-andrade/otp,getong/otp,lightcyphers/otp,jj1bdx/otp,lrascao/otp,vladdu/otp,getong/otp,goertzenator/otp,mikpe/otp,bsmr-erlang/otp,falkevik/otp,tuncer/otp,matwey/otp,weisslj/otp,isvilen/otp,bjorng/otp,vinoski/otp,massemanet/otp,emile/otp,fenollp/otp,vinoski/otp,isvilen/otp,jj1bdx/otp,tuncer/otp,getong/otp,falkevik/otp,rlipscombe/otp,vinoski/otp,mikpe/otp,erlang/otp,jj1bdx/otp,bugs-erlang-org/otp,vladdu/otp,kvakvs/otp,mikpe/otp,lightcyphers/otp,emile/otp,bernardd/otp,vladdu/otp,emile/otp,release-project/otp,g-andrade/otp,cobusc/otp,saleyn/otp,ahmedshafeeq/otp,neeraj9/otp,jj1bdx/otp,potatosalad/otp,release-project/otp,bjorng/otp,massemanet/otp,jj1bdx/otp,RoadRunnr/otp,falkevik/otp,ferd/otp,goertzenator/otp,jj1bdx/otp,g-andrade/otp,emile/otp,neeraj9/otp,bernardd/otp,erlang/otp,dumbbell/otp,kvakvs/otp,electricimp/otp,legoscia/otp,massemanet/otp,legoscia/otp,massemanet/otp,g-andrade/otp,bernardd/otp,falkevik/otp,dumbbell/otp,potatosalad/otp,uabboli/otp,dumbbell/otp,release-project/otp,erlang/otp,tuncer/otp,vladdu/otp,erlang/otp,ferd/otp,goertzenator/otp,basho/otp,vinoski/otp,mikpe/otp,getong/otp,saleyn/otp,mikpe/otp,RaimoNiskanen/otp,rlipscombe/otp,saleyn/otp,goertzenator/otp,ferd/otp,aboroska/otp,uabboli/otp,potatosalad/otp,weisslj/otp,vladdu/otp,electricimp/otp,neeraj9/otp,uabboli/otp,emacsmirror/erlang,rlipscombe/otp,ahmedshafeeq/otp,vinoski/otp,massemanet/otp,weisslj/otp,basho/otp,potatosalad/otp,bjorng/otp,tuncer/otp,legoscia/otp,lrascao/otp,bsmr-erlang/otp,fenollp/otp,saleyn/otp,dumbbell/otp,isvilen/otp,potatosalad/otp,dumbbell/otp,tuncer/otp,erlang/otp,dgud/otp,electricimp/otp,matwey/otp,lightcyphers/otp,release-project/otp,isvilen/otp,bsmr-erlang/otp,kvakvs/otp,basho/otp,weisslj/otp,goertzenator/otp,dumbbell/otp,vinoski/otp,lrascao/otp,getong/otp,RoadRunnr/otp,mikpe/otp,massemanet/otp,release-project/otp,potatosalad/otp,dgud/otp,lightcyphers/otp,rlipscombe/otp,basho/otp,ahmedshafeeq/otp,aboroska/otp,bjorng/otp,getong/otp,bugs-erlang-org/otp,saleyn/otp,RaimoNiskanen/otp,dgud/otp,massemanet/otp,legoscia/otp,fenollp/otp,bugs-erlang-org/otp,ahmedshafeeq/otp,RoadRunnr/otp,RoadRunnr/otp,saleyn/otp,kvakvs/otp,cobusc/otp,bernardd/otp,potatosalad/otp,electricimp/otp