Right now, the title looks like this:

"""
704.2%-1013.8% regression in memory.desktop at 552624:552658
"""
And usually there are links to graphs afterwards.

However, this is not particularly meaningful for the person receiving the bug, nor for me when I get cc-ed on. What I'd like to see is:

Title: X% regression in memory.desktop : GPU memory.

[Where X is the largest regression seen on any configuration]
[GPU memory is a stand-in for the various allocators that we alert on].