DeepLearning_in_R/libs/DiagrammeR-styles/styles.css

.DiagrammeR,.grViz pre {
  white-space: pre-wrap;       /* CSS 3 */
  white-space: -moz-pre-wrap;  /* Mozilla, since 1999 */
  white-space: -pre-wrap;      /* Opera 4-6 */
  white-space: -o-pre-wrap;    /* Opera 7 */
  word-wrap: break-word;       /* Internet Explorer 5.5+ */
}

.DiagrammeR g .label {
  font-family: Helvetica;
  font-size: 14px;
  color: #333333;
}