Clarify that digraphs are implemented using ETS tables
Clarify that digraphs are implemented using ETS tables

https://bugs.erlang.org/browse/ERL-1032

bjorng/otp,lrascao/otp,vinoski/otp,erlang/otp,vladdu/otp,mikpe/otp,potatosalad/otp,mikpe/otp,electricimp/otp,vladdu/otp,emacsmirror/erlang,vladdu/otp,uabboli/otp,isvilen/otp,aboroska/otp,vladdu/otp,rlipscombe/otp,isvilen/otp,vinoski/otp,kvakvs/otp,aboroska/otp,getong/otp,g-andrade/otp,mikpe/otp,aboroska/otp,isvilen/otp,erlang/otp,dgud/otp,potatosalad/otp,isvilen/otp,vladdu/otp,rlipscombe/otp,ferd/otp,emacsmirror/erlang,kvakvs/otp,getong/otp,vinoski/otp,kvakvs/otp,getong/otp,RoadRunnr/otp,mikpe/otp,vinoski/otp,vinoski/otp,getong/otp,dumbbell/otp,uabboli/otp,jj1bdx/otp,lrascao/otp,kvakvs/otp,vinoski/otp,getong/otp,lrascao/otp,jj1bdx/otp,g-andrade/otp,mikpe/otp,ferd/otp,vinoski/otp,isvilen/otp,ferd/otp,g-andrade/otp,potatosalad/otp,electricimp/otp,g-andrade/otp,mikpe/otp,emacsmirror/erlang,dgud/otp,bjorng/otp,isvilen/otp,getong/otp,bjorng/otp,vladdu/otp,lrascao/otp,potatosalad/otp,kvakvs/otp,bjorng/otp,dumbbell/otp,kvakvs/otp,emacsmirror/erlang,lrascao/otp,dumbbell/otp,potatosalad/otp,isvilen/otp,potatosalad/otp,dumbbell/otp,RoadRunnr/otp,ferd/otp,dgud/otp,erlang/otp,emacsmirror/erlang,electricimp/otp,ferd/otp,aboroska/otp,bjorng/otp,electricimp/otp,aboroska/otp,mikpe/otp,getong/otp,vladdu/otp,bjorng/otp,bjorng/otp,mikpe/otp,uabboli/otp,electricimp/otp,potatosalad/otp,ferd/otp,lrascao/otp,getong/otp,RoadRunnr/otp,vladdu/otp,uabboli/otp,dumbbell/otp,potatosalad/otp,aboroska/otp,dgud/otp,bjorng/otp,erlang/otp,rlipscombe/otp,erlang/otp,dumbbell/otp,isvilen/otp,vinoski/otp,jj1bdx/otp,ferd/otp,bjorng/otp,RoadRunnr/otp,dgud/otp,ferd/otp,electricimp/otp,jj1bdx/otp,isvilen/otp,RoadRunnr/otp,RoadRunnr/otp,uabboli/otp,dgud/otp,uabboli/otp,dumbbell/otp,vinoski/otp,getong/otp,kvakvs/otp,lrascao/otp,ferd/otp,jj1bdx/otp,erlang/otp,g-andrade/otp,rlipscombe/otp,g-andrade/otp,jj1bdx/otp,erlang/otp,dgud/otp,dgud/otp,RoadRunnr/otp,rlipscombe/otp,erlang/otp,dumbbell/otp,uabboli/otp,jj1bdx/otp,g-andrade/otp,dgud/otp,kvakvs/otp,g-andrade/otp,electricimp/otp,uabboli/otp,jj1bdx/otp,emacsmirror/erlang,lrascao/otp,potatosalad/otp,g-andrade/otp,aboroska/otp,dumbbell/otp,bjorng/otp,kvakvs/otp,isvilen/otp,g-andrade/otp,RoadRunnr/otp,lrascao/otp,potatosalad/otp,electricimp/otp,uabboli/otp,rlipscombe/otp,jj1bdx/otp,rlipscombe/otp,aboroska/otp,rlipscombe/otp,vladdu/otp,getong/otp,aboroska/otp,RoadRunnr/otp,electricimp/otp,emacsmirror/erlang,dgud/otp,jj1bdx/otp,mikpe/otp,emacsmirror/erlang,emacsmirror/erlang,vinoski/otp,rlipscombe/otp,emacsmirror/erlang,erlang/otp,mikpe/otp,erlang/otp,rlipscombe/otp,dumbbell/otp