[clang][dataflow][NFC] Fix code formatting in DataflowEnvironment.cpp (#89352)

For some reason, when I merged #89235, two lines were mis-formatted.

This patch corrects this; while I'm here, I'm also correcting other
existing formatting errors.

GitOrigin-RevId: 14122106320b88f114301bbf8694ceac9bb7a27a
1 file changed