anchor.diff:  
       case binary:match(preminder_github:endpoint(), Host) =/= nomatch andalso preminder_github:pr(Owner, Repos, Number) of
           {ok, Body, open} ->
  -            Accounts = [Account || [_, _, Account] <- matches(Body, <<"(-|\\*)\s*\\[\s\\]\s@([^\s\\r\\n]*)\s*">>)],
  +            Accounts = [Account || [_, _, Account] <- matches(Body, <<"(-|\\*)\\s*\\[\\s\\]\\s@([^\\s\\r\\n]*)\\s*">>)],
               _ = ?NOT(lists:all(fun(Account) -> preminder_user:github_to_mail(Account) =/= error end, Accounts),
                        case preminder_github:fetch_mails(Owner, Repos, Number) of
                            {ok, GithubInfos} ->
  
positive.code: %%----------------------------------------------------------------------------------------------------------------------
  
  task_remind(Text, Channel) ->
      Matches = matches(Text, <<"https?://[^\s]*(pull|issue)/[0-9]*">>),
      Urls = [GithubUrl || [GithubUrl | _] <- Matches],
      Ret = preminder_pr:r_list(Urls),
      preminder_slack:post(Channel, bbmustache:compile(bbmustache:parse_file(?PRIV("list_all.mustache")), Ret)).
  
negative.code:     do_1(In#{<<"text">> => PreText, <<"attachments">> => nil});
  do_1(#{<<"type">> := <<"message">>, <<"text">> := Text, <<"channel">> := Channel}) ->
      Tasks0 = [
                {{mention, <<"remind">>},                             {?MODULE, task_remind,     [Text, Channel]}},
                {<<"https?://[^\\s]*(pull|issue)/[0-9]*">>,           {?MODULE, task_github_url, ['$$']}},
                {{mention, <<"list(.*)">>},                           {?MODULE, task_list,       ['$1', Channel]}},
                {{mention, <<"register\\s+([^\\s]*)\\s+([^\\s]*)">>}, {?MODULE, task_register,   ['$1', '$2', Channel]}},
                {{mention, <<"user\\s+([^\\s]*)">>},                  {?MODULE, task_user,       ['$1', Channel]}},
                {{mention, <<"help">>},                               {?MODULE, task_help,       [Channel]}},
                {{mention, <<"^.*">>},                                {?MODULE, task_help,       [Channel]}}
               ],
      Tasks = choose_tasks(Text, Tasks0),
      execute_tasks(Tasks);
  