Customize output for ATOM package insert-timestamp

slight change on the @DateT return

DateT: ->
    date = new Date()
    dateText = [
      date.getFullYear(), '-', (date.getMonth() + 1), '-', date.getDate(), ' ',
      date.getHours(), ':', date.getMinutes(), ':', date.getSeconds()
    ].join("").replace( /\b(\d)\b/g, "0$1" )

    editor = atom.workspace.getActivePaneItem()
    editor.insertText(dateText)