edoc: Fix a Dialyzer warning
edoc: Fix a Dialyzer warning

Commit 15a631c introduced a Dialyzer warning.

When the new string module is merged to master, this commit can be
reverted.

kvakvs/otp,falkevik/otp,aboroska/otp,getong/otp,erlang/otp,kvakvs/otp,bernardd/otp,electricimp/otp,cobusc/otp,uabboli/otp,legoscia/otp,bjorng/otp,fenollp/otp,rlipscombe/otp,mikpe/otp,getong/otp,rlipscombe/otp,goertzenator/otp,vladdu/otp,falkevik/otp,matwey/otp,isvilen/otp,tuncer/otp,saleyn/otp,getong/otp,cobusc/otp,bjorng/otp,legoscia/otp,getong/otp,goertzenator/otp,dgud/otp,cobusc/otp,massemanet/otp,saleyn/otp,matwey/otp,cobusc/otp,matwey/otp,vinoski/otp,potatosalad/otp,g-andrade/otp,saleyn/otp,jj1bdx/otp,erlang/otp,tuncer/otp,saleyn/otp,vinoski/otp,electricimp/otp,dgud/otp,isvilen/otp,tuncer/otp,massemanet/otp,bernardd/otp,emacsmirror/erlang,isvilen/otp,uabboli/otp,mikpe/otp,bsmr-erlang/otp,vladdu/otp,bsmr-erlang/otp,goertzenator/otp,emacsmirror/erlang,uabboli/otp,erlang/otp,fenollp/otp,vinoski/otp,vinoski/otp,goertzenator/otp,vladdu/otp,jj1bdx/otp,getong/otp,g-andrade/otp,isvilen/otp,bsmr-erlang/otp,goertzenator/otp,electricimp/otp,dumbbell/otp,falkevik/otp,legoscia/otp,ferd/otp,g-andrade/otp,potatosalad/otp,lrascao/otp,potatosalad/otp,bjorng/otp,electricimp/otp,tuncer/otp,goertzenator/otp,bjorng/otp,fenollp/otp,electricimp/otp,ferd/otp,mikpe/otp,kvakvs/otp,massemanet/otp,aboroska/otp,uabboli/otp,RaimoNiskanen/otp,uabboli/otp,bsmr-erlang/otp,dgud/otp,RaimoNiskanen/otp,fenollp/otp,getong/otp,dgud/otp,saleyn/otp,kvakvs/otp,RaimoNiskanen/otp,falkevik/otp,RaimoNiskanen/otp,isvilen/otp,potatosalad/otp,ferd/otp,rlipscombe/otp,lrascao/otp,vladdu/otp,kvakvs/otp,lrascao/otp,jj1bdx/otp,g-andrade/otp,fenollp/otp,bernardd/otp,mikpe/otp,vinoski/otp,dumbbell/otp,rlipscombe/otp,erlang/otp,ferd/otp,jj1bdx/otp,mikpe/otp,massemanet/otp,getong/otp,dgud/otp,isvilen/otp,rlipscombe/otp,RoadRunnr/otp,g-andrade/otp,vladdu/otp,saleyn/otp,vinoski/otp,falkevik/otp,uabboli/otp,goertzenator/otp,matwey/otp,emacsmirror/erlang,bernardd/otp,bernardd/otp,cobusc/otp,vladdu/otp,dgud/otp,dgud/otp,isvilen/otp,bernardd/otp,potatosalad/otp,lrascao/otp,bjorng/otp,aboroska/otp,ferd/otp,saleyn/otp,kvakvs/otp,bsmr-erlang/otp,legoscia/otp,electricimp/otp,vinoski/otp,emacsmirror/erlang,emacsmirror/erlang,legoscia/otp,mikpe/otp,matwey/otp,rlipscombe/otp,matwey/otp,kvakvs/otp,aboroska/otp,kvakvs/otp,mikpe/otp,erlang/otp,falkevik/otp,massemanet/otp,electricimp/otp,uabboli/otp,bjorng/otp,tuncer/otp,tuncer/otp,erlang/otp,fenollp/otp,lrascao/otp,potatosalad/otp,electricimp/otp,jj1bdx/otp,goertzenator/otp,emacsmirror/erlang,potatosalad/otp,mikpe/otp,lrascao/otp,falkevik/otp,RoadRunnr/otp,erlang/otp,RoadRunnr/otp,vladdu/otp,massemanet/otp,g-andrade/otp,saleyn/otp,erlang/otp,RaimoNiskanen/otp,bjorng/otp,mikpe/otp,g-andrade/otp,fenollp/otp,legoscia/otp,potatosalad/otp,emacsmirror/erlang,goertzenator/otp,ferd/otp,vinoski/otp,erlang/otp,matwey/otp,dumbbell/otp,massemanet/otp,legoscia/otp,emacsmirror/erlang,RoadRunnr/otp,bjorng/otp,dumbbell/otp,potatosalad/otp,massemanet/otp,isvilen/otp,vladdu/otp,getong/otp,saleyn/otp,rlipscombe/otp,ferd/otp,tuncer/otp,lrascao/otp,getong/otp,lrascao/otp,ferd/otp,rlipscombe/otp,RoadRunnr/otp,legoscia/otp,cobusc/otp,RaimoNiskanen/otp,dgud/otp,cobusc/otp,vinoski/otp,dumbbell/otp,cobusc/otp,rlipscombe/otp,bsmr-erlang/otp,potatosalad/otp,electricimp/otp,dumbbell/otp,legoscia/otp,bsmr-erlang/otp,aboroska/otp,getong/otp,dumbbell/otp,tuncer/otp,jj1bdx/otp,isvilen/otp,RoadRunnr/otp,fenollp/otp,aboroska/otp,ferd/otp,bernardd/otp,bjorng/otp,aboroska/otp,RaimoNiskanen/otp,uabboli/otp,matwey/otp,vinoski/otp,bernardd/otp,bsmr-erlang/otp,bsmr-erlang/otp,rlipscombe/otp,bernardd/otp,lrascao/otp,dumbbell/otp,RoadRunnr/otp,jj1bdx/otp,tuncer/otp,uabboli/otp,jj1bdx/otp,matwey/otp,isvilen/otp,fenollp/otp,RoadRunnr/otp,aboroska/otp,emacsmirror/erlang,dgud/otp,massemanet/otp,jj1bdx/otp,falkevik/otp,emacsmirror/erlang,jj1bdx/otp,erlang/otp,g-andrade/otp,falkevik/otp,bjorng/otp,RaimoNiskanen/otp,mikpe/otp,aboroska/otp,kvakvs/otp,dumbbell/otp,RoadRunnr/otp,RaimoNiskanen/otp,g-andrade/otp,g-andrade/otp,dgud/otp,vladdu/otp,dumbbell/otp