The HTML in Atlas uses the data-original-title attribute which serves no purpose other than to clutter up the code. FWICT this is left over code from when Atlas used the Bootstrap Popover plugin which was removed in commit [7a0ee0c7e69b10c33d671395f17c9cf8664bd2f9](https://gitweb.torproject.org/atlas.git/commit/?id=7a0ee0c7e69b10c33d671395f17c9cf8664bd2f9). The Bootstrap Tooltip plugin overwrites the data-original-title attribute when the title attribute is specified in the [fixTitle function](https://gitweb.torproject.org/atlas.git/tree/js/libs/bootstrap/bootstrap-tooltip.js?id=a2b3f23f0212a16ae410d513749b535fdbe6bc5a#n191). In the current code base all elements that use the data-original-title attribute also specify the title attribute so the former serves no purpose.