anchor.diff:  
   %% @doc Convert an HTTP version to atom.
   
  --spec parse_version(binary()) -> 'HTTP/1.1' | 'HTTP/1.0'.
  -parse_version(<<"HTTP/1.1">>) ->
  -	'HTTP/1.1';
  -parse_version(<<"HTTP/1.0">>) ->
  -	'HTTP/1.0'.
  +-spec parse_version(binary()) -> version().
  +parse_version(<<"HTTP/1.1">>) -> 'HTTP/1.1';
  +parse_version(<<"HTTP/1.0">>) -> 'HTTP/1.0'.
   
   -ifdef(TEST).
   parse_version_test() ->
  
positive.code: 
  -type version() :: 'HTTP/1.0' | 'HTTP/1.1'.
  -type status() :: 100..999.
  -type headers() :: [{binary(), binary()}].
  
  -include("cow_inline.hrl").
  
  
negative.code: 
  %% @doc Parse the list of headers.
  
  -spec parse_headers(binary()) -> {[{binary(), binary()}], binary()}.
  parse_headers(Data) ->
  	parse_header(Data, []).
  
  