anchor.diff:  
   -define(SELECT_INFO(Tag, SelectHandle),
           {select_info, Tag, SelectHandle}).
  +
   
   %% ===========================================================================
   %%
  
positive.code:     <<A/binary, B/binary>>.
  
  
  %% p(F) ->
  %%     p(F, []).
  
  
negative.code: 
  -type posix() :: inet:posix().
  
  -type info_keys() :: [
  		      'domain' | 'type' | 'protocol' |
  		      'fd' | 'owner' |
  		      'local_address' | 'remote_address' |
  		      'recv' | 'sent' |
  		      'state'
  		     ].
  
  
  %% ===========================================================================
  %%
  %% Interface term formats
  