I think you can work around a reformat this way:
1. Do a reformat of the code prior to the simplename patch and tag it
2. Do a reformat of the code with the simplename patch applied and tag it
3. Generate a patch that is the diff of steps 1 and 2
No guarantees, but it should be pretty much the same to apply the new
patch on top of the reformat as on top of step 1 above.