anchor.diff:      add_vbinding('$ENV', Env2, Env2).
   
   add_shell_functions(Env0) ->
  -    Fs = [{i,0,[lambda,[],[':',lfe_shell,i]]},
  +    Fs = [{help,0,[lambda,[],[':',lfe_shell,help]]},
  +          {i,0,[lambda,[],[':',lfe_shell,i]]},
             {i,1,[lambda,[ps],[':',lfe_shell,i,ps]]},
             %% {m,0,[lambda,[],[':',lfe_shell,m]]},
             %% {m,1,[lambda,[ms],[':',lfe_shell,m,ms]]},
             {pid,3,[lambda,[i,j,k],[':',lfe_shell,pid,i,j,k]]},
             {p,1,[lambda,[e],[':',lfe_shell,p,e]]},
             {pp,1,[lambda,[e],[':',lfe_shell,pp,e]]},
  +          {pwd,0,[lambda,[],[':',lfe_shell,pwd]]},
  +          {q,0,[lambda,[],[':',lfe_shell,exit]]},
             {regs,0,[lambda,[],[':',lfe_shell,regs]]},
             {exit,0,[lambda,[],[':',lfe_shell,exit]]}
            ],
  
positive.code: 
  ec(F, Os) -> c:c(F, Os).
  
  %% i([Pids]) -> ok.
  
  i() -> c:i().
  
negative.code:          run_script/2,run_script/3,run_string/2,run_string/3]).
  
  %% The shell commands which generally callable.
  -export([c/1,c/2,cd/1,ec/1,ec/2,help/0,i/0,i/1,l/1,ls/1,m/0,m/1,
           pid/3,p/1,pp/1,pwd/0,q/0,regs/0,exit/0]).
  
  -import(lfe_env, [new/0,add_env/2,
                    add_vbinding/3,add_vbindings/2,is_vbound/2,get_vbinding/2,
  