.CodeMirror-foldmarker {
  color: white;	
  font-family: arial;
  line-height: .3;
  cursor: pointer;
}
.CodeMirror-foldgutter {
  width: .7em;
}
.CodeMirror-foldgutter-open,
.CodeMirror-foldgutter-folded {
  color: #555;
  cursor: pointer;
}
.CodeMirror-foldgutter-open:after {
  content: "\25bc";
}
.CodeMirror-foldgutter-folded:after {
  content: "\25b6";
}