message: fix(aio): make the ToC left hand-side bar shorter
  Make the ToC left hand-side bar shorter, so that it starts at the initial bullet
  and ends at the final bullet.
  Fixes
diff: @@ -148,12 +148,11 @@ aio-toc {
  a {
  color: $blue;
  font-weight: 500;
  - }
  &:before {
  content: '';
  border-radius: 50%;
  - left: -4px;
  + left: -3px;
  top: 12px;
  background: $blue;
  position: absolute;
  @@ -162,16 +161,30 @@ aio-toc {
  }
  }
  }
  + }
  &:not(.embedded) li {
  - &.h1, &.h2, &.h3 {
  + &:before {
  border-left: 1px solid $lightgray;
  + bottom: 0;
  + content: '';
  + left: 0;
  + position: absolute;
  + top: 0;
  }
  - &:not(.active):hover:before {
  + &:first-child:before {
  + top: 13px;
  + }
  +
  + &:last-child:before {
  + bottom: calc(100% - 14px);
  + }
  +
  + &:not(.active):hover a:before {
  content: '';
  border-radius: 50%;
  - left: -4px;
  + left: -3px;
  top: 12px;
  background: $lightgray;
  position: absolute;
  