paperdoorknob.process(spec)
assert re.match(br'''\\documentclass{article}
(\\usepackage{[a-z]+}\n)+\\usepackage\[margin=20mm\]{geometry}
paperdoorknob.process(spec)
assert re.match(br'''\\documentclass{article}
(\\usepackage{[a-z]+}\n)+\\usepackage\[margin=20mm\]{geometry}
paperdoorknob.process(spec)
subprocess.run(['pdflatex', 'test.tex'],
stdin=subprocess.DEVNULL, check=True)
paperdoorknob.process(spec)
subprocess.run(['pdflatex', 'test.tex'],
stdin=subprocess.DEVNULL, check=True)