Atom editor - emphasis trailing whitespaces

style.css

/* Red trailing whitespaces (https://gist.github.com/brunetton/a55c6e8735eeee68067b) */
atom-text-editor::shadow .lines .line {
  .trailing-whitespace {
    color: #ff2a2a;
    background: #342022;
  }

  // Disable highlight for lines with a cursor on them
  &.cursor-line .trailing-whitespace {
    color: inherit;
    background: inherit;
  }
}