- Fix many false positives, this includes compiled header files, lines with
only CC=gcc but no other compiler commands and `moc-qt4`/`moc-qt5` commands.
- Accept -Wformat=2 because it implies -Wformat.
- Fix many false positives, this includes compiled header files, lines with
only CC=gcc but no other compiler commands and `moc-qt4`/`moc-qt5` commands.
- Accept -Wformat=2 because it implies -Wformat.