`.qr` files replace `.png` instead of appending
@arechnitzer how would you feel about changing:
t0001p01v1.fake_scribbled_exams1-01.png
t0001p01v1.fake_scribbled_exams1-01.png.qr
t0001p02v1.fake_scribbled_exams1-02.jpeg
t0001p02v1.fake_scribbled_exams1-02.jpeg.qr
to
t0001p01v1.fake_scribbled_exams1-01.png
t0001p01v1.fake_scribbled_exams1-01.qr
t0001p02v1.fake_scribbled_exams1-02.jpeg
t0001p02v1.fake_scribbled_exams1-02.qr
It might simplify a lot of the fname[-3:]
manipulations, viz:
>>> p = Path('/foo/bar/fake_scribbled_exams2-12.png')
PosixPath('/foo/bar/fake_scribbled_exams2-12.png')
>>> p.with_suffix('.qr')
PosixPath('/foo/bar/fake_scribbled_exams2-12.qr')