fix pep8 E302

diffoscope/comparators/apk.py

diffoscope/comparators/ar.py

diffoscope/comparators/cbfs.py

diffoscope/comparators/debian.py

diffoscope/comparators/debian_fallback.py

diffoscope/comparators/device.py

diffoscope/comparators/dex.py

diffoscope/comparators/dtb.py

diffoscope/comparators/elf.py

diffoscope/comparators/git.py

diffoscope/comparators/haskell.py

diffoscope/comparators/javascript.py

diffoscope/comparators/llvm.py

diffoscope/comparators/openssh.py

diffoscope/comparators/rdata.py

diffoscope/comparators/rpm_fallback.py

diffoscope/comparators/tar.py

diffoscope/comparators/utils/compare.py

diffoscope/comparators/utils/file.py

diffoscope/comparators/xml.py