$('form#submit-repo').submit(
  function(evt){
    evt.preventDefault();

    var status = $('#status');
    var repo = $('label[for="repo_name"]').text() + $('input[name="repo_name"]').val();
    var text = 'Processing to create ' + repo + ' ...';
    $('#status').children().remove();
    var processing = $('<span id="processing">').text(text)
    status.append(processing);

    var xhr = $.post(
      '/manage',
      $(this).serialize(),
      function(data, status_code, jqxhr) {
        $('#status').children().remove()
        status.append($('<p>').text(data.message));
      }
    );

    $('input[name="repo_name"]').val('');

  }
);

$('form#submit-repo').submit(
  function(evt){
    evt.preventDefault();

    var status = $('#status');
    var repo = $('label[for="repo_name"]').text() + $('input[name="repo_name"]').val();
    var text = 'Processing to create ' + repo + ' ...';
    $('#status').children().remove();
    var processing = $('<span id="processing">').text(text)
    status.append(processing);

    var xhr = $.post(
      '/manage',
      $(this).serialize(),
      function(data, status_code, jqxhr) {
        $('#status').children().remove()
        status.append($('<p>').html(data.message));
      }
    );

    $('input[name="repo_name"]').val('');

  }
);

Set html of the message displayed to user, instead of text.
Set html of the message displayed to user, instead of text.
