I imagine that it's using the functionality mentioned at https://gitlab.com/gitlab-org/gitlab-fo ... 2094021512, which appears to be instance-wide? Irrespective, can this be configured per-user?
I ask because it makes visually parsing the different sections of the document difficult on a desktop e-mail client, and makes merely reading the notification e-mail on a non-16:9 display (like that of a smartphone) difficult too. At least, for me.