Writing code with the following notation in quadruple precision would result in wasted spaces that would cause the compilation to fail, as shown below
code

real(16) :: r
r=1.0q-10

The above code is formatted as follows

real(16) :: r
r = 1.0q - 10

The expected formatting is as follows

real(16) :: r
r = 1.0q-10

Adding the --disable-whitespace option prevent this problem,
but it would also ignore all other whitespace-related formats,
so it would be preferable to support quadruple precision q and Q representations, but I'm not sure.