I have a Jamis Citizen 2002 that I like a lot. But I notice that the right pedal seems to be slightly bent, in that the pedal itself is slightly angled outward. You can see it in the image below, taken looking down on the pedal. Not sure how that happened. Looks like it would have to have been run over by a truck, but ...

To the extent that something bent the pedal arm, I'd like to try to bend it back. (Ideally without running it over with a truck!)

The question is, how does one remove the pedal arm from the bike? There appears to be a keyhole of some sort, surrounded by hex flats. See second image. How does one take off the pedal? What's the keyhole for?

I guess I might have to just buy a new pedal assembly, but I still need to get the thing off!