stdlib: Fix shell_SUITE after erl_pp fix
stdlib: Fix shell_SUITE after erl_pp fix

a657406 changes the way -1 is printed by erl_pp so
we need to update this testcase.

dumbbell/otp,potatosalad/otp,getong/otp,emacsmirror/erlang,dgud/otp,emacsmirror/erlang,rlipscombe/otp,potatosalad/otp,isvilen/otp,potatosalad/otp,dgud/otp,mikpe/otp,getong/otp,erlang/otp,g-andrade/otp,vinoski/otp,emacsmirror/erlang,emacsmirror/erlang,vinoski/otp,jj1bdx/otp,dumbbell/otp,rlipscombe/otp,rlipscombe/otp,vinoski/otp,isvilen/otp,g-andrade/otp,emacsmirror/erlang,bjorng/otp,rlipscombe/otp,erlang/otp,mikpe/otp,dgud/otp,rlipscombe/otp,emacsmirror/erlang,mikpe/otp,dgud/otp,dgud/otp,dumbbell/otp,isvilen/otp,bjorng/otp,potatosalad/otp,erlang/otp,bjorng/otp,jj1bdx/otp,mikpe/otp,dgud/otp,g-andrade/otp,potatosalad/otp,dumbbell/otp,rlipscombe/otp,mikpe/otp,isvilen/otp,isvilen/otp,g-andrade/otp,mikpe/otp,jj1bdx/otp,bjorng/otp,dgud/otp,erlang/otp,dgud/otp,erlang/otp,g-andrade/otp,jj1bdx/otp,erlang/otp,bjorng/otp,vinoski/otp,g-andrade/otp,g-andrade/otp,getong/otp,jj1bdx/otp,vinoski/otp,bjorng/otp,rlipscombe/otp,jj1bdx/otp,getong/otp,rlipscombe/otp,emacsmirror/erlang,erlang/otp,rlipscombe/otp,vinoski/otp,potatosalad/otp,bjorng/otp,dumbbell/otp,dumbbell/otp,dumbbell/otp,potatosalad/otp,dumbbell/otp,vinoski/otp,isvilen/otp,potatosalad/otp,bjorng/otp,emacsmirror/erlang,jj1bdx/otp,g-andrade/otp,g-andrade/otp,bjorng/otp,getong/otp,jj1bdx/otp,rlipscombe/otp,isvilen/otp,isvilen/otp,emacsmirror/erlang,isvilen/otp,dgud/otp,getong/otp,mikpe/otp,jj1bdx/otp,erlang/otp,potatosalad/otp,getong/otp,jj1bdx/otp,getong/otp,potatosalad/otp,erlang/otp,vinoski/otp,mikpe/otp,isvilen/otp,bjorng/otp,mikpe/otp,dumbbell/otp,vinoski/otp,g-andrade/otp,erlang/otp,getong/otp,emacsmirror/erlang,vinoski/otp,dgud/otp,dumbbell/otp,mikpe/otp,getong/otp