anchor.diff:  	 filter_partition/1, 
   	 otp_5939/1, otp_6023/1, otp_6606/1, otp_7230/1,
   	 prefix/1, suffix/1, subtract/1, droplast/1, hof/1,
  -	 split/1]).
  +	 split/1, concat/1]).
   
   %% Sort randomized lists until stopped.
   %%
  
positive.code:      {zip, [parallel], [zip_unzip, zip_unzip3, zipwith, zipwith3]},
       {misc, [parallel], [reverse, member, dropwhile, takewhile,
  			 filter_partition, prefix, suffix, subtract,
  			 hof, split]}
      ].
  
  init_per_suite(Config) ->
  
negative.code:     LenB = length(B),
      LenB = Len - N,
      do_split_1(N+1, Len, List).
  
  %% Test lists:concat/1 mainly for coverage.
  concat(Config) when is_list(Config) ->
      S = integer_to_list(42) ++ "pi: " ++ float_to_list(math:pi()),
      S = lists:concat([42,pi,": ",math:pi()]),
      ok.
  