message: fix(docs-infra): correctly display copy button in IE11
  Fix button top portion was clipped in IE11 by setting overflow to visible
  Fixes
  PR Close
diff: @@ -108,6 +108,7 @@ aio-code pre {
  top: -7px;
  right: -19px;
  padding: 0;
  + overflow: visible; // This is required for the button to be displayed correctly in IE11.
  color: $blue-grey-200;
  background-color: transparent;
  