message: docs(css): enable momentum scrolling for iOS
  All other mobile and desktop platforms with built-in momentum scrolling
  enable it by default. iOS requires an explicit CSS rule.
diff: @@ -127,6 +127,7 @@ body.light-theme .navigation, body.dark-theme .navigation {
  height: calc(100% - 40px);
  background-color: #333;
  padding: 10px;
  + -webkit-overflow-scrolling: touch;
  }
  body.light-theme .navigation {
  @@ -208,6 +209,7 @@ a:hover {
  overflow-y: scroll;
  height: calc(100vh - 40px);
  box-sizing: border-box;
  + -webkit-overflow-scrolling: touch;
  }
  .content .detail {
  