hr {
  text-align: center; /* horizontal centering */
  line-height: 1px; /* vertical centering */
  border-width: 0px 0; /* top and bottom borders */
  margin: 50px 0px; /* 20px space above/below, 10px left/right */
}

hr:after {
  content: "§"; /* CHOOSE SYMBOL */
}

section ul {
  list-style-type: none;
  padding-left:0;
}

.abbreviation {
   text-indent:0;
}

#tableofcontents ul>li>ul>li {
    text-indent: 40px;
}