In what may be the most minor change I’ve ever seen, Google is now testing bullets ( • ) as the separator in sitelinks of AdWords ads. During most searches, Google uses a simple dash ( – ) between the links. Google has been running lots of AdWords tests lately, but I haven’t seen many changes to the sitelink layout recently. Below are two examples of the same query both with and without the new style of separator.

sitelinks bullets
Google AdWords is testing these style sitelinks.
sitelinks dashes
The old style of Google sitelinks.