minorbug(install): using /proc/self/mem as a dst leads to show raw rust errors not standard human readable errors

[HackingRepo]

Hi, uutils mainteners

note: that just a minor bug not like the previous one the errors shown correctly, the problem only shown in raw format, i used

relunsec@relunsec:~/software/coreutils/target/debug$ ./install -g 0 /dev/full /proc/self/mem
install: Failed to remove existing file '/proc/self/mem'. Error: Os { code: 1, kind: PermissionDenied, message: "Operation not permitted" }
install: Already exists

to reproduce that, as i see it shows Os {} it is a raw error formatting not human readable format