The value for device is copied into the SOURCE column of findmnt.
By default this is "none". The mount and unmount scripts
branch on SOURCE=fsType specifically, and the existence of "none"
in the SOURCE column causes wrong branches to be executed.
For a list of special filesystems, the default value "none"
is replaced by the value for fsType.
Fixes#130
This should fix pretty much all cases where spaces or other special
characters would break disko due to improper quoting. I searched for all
instances of '.label', '.device' and '.name', so I believe I caught
whatever I could.
In some cases I changed single quotes to double quotes for consistency.
I know we don't usually fix bugs in the legacy table type, but it was so
easy I couldn't resist.