it was wrongly added in commit 7cd51d36c05a66555b07a7fa850b21686ded2e1a

The issue is that lsparts is relying on fs::proc_partitions::read_raw(),
which reads /proc/partition which reports size of devices in 1kb blocks
instead of expected 512b sectors elsewhere...

The size is adjusted by *2 in read() but lsparts only used the lower
level interface.

This bug was introduced in commit 20e553d8f0ead3d5de1fb61d1aa255dd35549cf2

(need latest perl_checker)

also prevent arguments to be split on spaces & the like