Previously when filenames contained spaces, the function would break as
`awk {print $2,$1}` would only print a part of the filename.
The field swap was used as a workaround so that `uniq` only compares the
sizes, and `uniq` unfortunately only has a flag to **skip** fields.
Fix this issue by using a short awk script that mimics `uniq` but only
with the first field (i.e. the size).
My awk foo is unfortunately not very good, and that is why the one-liner
prints out the first duplicated line multiple time. The `sort -u` pipe
afterwards gets rid of those.
Julian Prein
b38e01c72a
