`ls` and `ls --recursive` use a different formatting

[Jan Kundrát]

The non-recursive version shows just a short, relative path, and it omits module prefixes when possible, like this:

/ietf-interfaces:interfaces/interface[name='br0']> ls
Possible nodes:
description
enabled
higher-layer-if
last-change
lower-layer-if
name
oper-status
phys-address
speed
statistics
type
czechlight-network:bridge
ietf-ip:ipv4
ietf-ip:ipv6
ietf-network-instance:bind-ni-name

The recursive version always prints out full, absolute schema XPath:

/ietf-interfaces:interfaces/interface[name='br0']> ls --recursive
Possible nodes:
/ietf-interfaces:interfaces/interface/czechlight-network:bridge
/ietf-interfaces:interfaces/interface/description
/ietf-interfaces:interfaces/interface/enabled
/ietf-interfaces:interfaces/interface/higher-layer-if
/ietf-interfaces:interfaces/interface/ietf-ip:ipv4
/ietf-interfaces:interfaces/interface/ietf-ip:ipv4/address
/ietf-interfaces:interfaces/interface/ietf-ip:ipv4/address/ip
/ietf-interfaces:interfaces/interface/ietf-ip:ipv4/address/origin
/ietf-interfaces:interfaces/interface/ietf-ip:ipv4/address/prefix-length
/ietf-interfaces:interfaces/interface/ietf-ip:ipv4/czechlight-network:dhcp-client
/ietf-interfaces:interfaces/interface/ietf-ip:ipv4/enabled
/ietf-interfaces:interfaces/interface/ietf-ip:ipv4/forwarding
/ietf-interfaces:interfaces/interface/ietf-ip:ipv4/ietf-network-instance:bind-ni-name
/ietf-interfaces:interfaces/interface/ietf-ip:ipv4/mtu
/ietf-interfaces:interfaces/interface/ietf-ip:ipv4/neighbor
/ietf-interfaces:interfaces/interface/ietf-ip:ipv4/neighbor/ip
/ietf-interfaces:interfaces/interface/ietf-ip:ipv4/neighbor/link-layer-address
/ietf-interfaces:interfaces/interface/ietf-ip:ipv4/neighbor/origin
/ietf-interfaces:interfaces/interface/ietf-ip:ipv6
/ietf-interfaces:interfaces/interface/ietf-ip:ipv6/address
/ietf-interfaces:interfaces/interface/ietf-ip:ipv6/address/ip
/ietf-interfaces:interfaces/interface/ietf-ip:ipv6/address/origin
/ietf-interfaces:interfaces/interface/ietf-ip:ipv6/address/prefix-length
/ietf-interfaces:interfaces/interface/ietf-ip:ipv6/address/status
/ietf-interfaces:interfaces/interface/ietf-ip:ipv6/autoconf
/ietf-interfaces:interfaces/interface/ietf-ip:ipv6/autoconf/create-global-addresses
/ietf-interfaces:interfaces/interface/ietf-ip:ipv6/dup-addr-detect-transmits
/ietf-interfaces:interfaces/interface/ietf-ip:ipv6/enabled
/ietf-interfaces:interfaces/interface/ietf-ip:ipv6/forwarding
/ietf-interfaces:interfaces/interface/ietf-ip:ipv6/ietf-network-instance:bind-ni-name
/ietf-interfaces:interfaces/interface/ietf-ip:ipv6/mtu
/ietf-interfaces:interfaces/interface/ietf-ip:ipv6/neighbor
/ietf-interfaces:interfaces/interface/ietf-ip:ipv6/neighbor/ip
/ietf-interfaces:interfaces/interface/ietf-ip:ipv6/neighbor/is-router
/ietf-interfaces:interfaces/interface/ietf-ip:ipv6/neighbor/link-layer-address
/ietf-interfaces:interfaces/interface/ietf-ip:ipv6/neighbor/origin
/ietf-interfaces:interfaces/interface/ietf-ip:ipv6/neighbor/state
/ietf-interfaces:interfaces/interface/ietf-network-instance:bind-ni-name
/ietf-interfaces:interfaces/interface/last-change
/ietf-interfaces:interfaces/interface/lower-layer-if
/ietf-interfaces:interfaces/interface/name
/ietf-interfaces:interfaces/interface/oper-status
/ietf-interfaces:interfaces/interface/phys-address
/ietf-interfaces:interfaces/interface/speed
/ietf-interfaces:interfaces/interface/statistics
/ietf-interfaces:interfaces/interface/statistics/in-broadcast-pkts
/ietf-interfaces:interfaces/interface/statistics/in-discards
/ietf-interfaces:interfaces/interface/statistics/in-errors
/ietf-interfaces:interfaces/interface/statistics/in-multicast-pkts
/ietf-interfaces:interfaces/interface/statistics/in-octets
/ietf-interfaces:interfaces/interface/statistics/in-unicast-pkts
/ietf-interfaces:interfaces/interface/statistics/in-unknown-protos
/ietf-interfaces:interfaces/interface/statistics/out-broadcast-pkts
/ietf-interfaces:interfaces/interface/statistics/out-discards
/ietf-interfaces:interfaces/interface/statistics/out-errors
/ietf-interfaces:interfaces/interface/statistics/out-multicast-pkts
/ietf-interfaces:interfaces/interface/statistics/out-octets
/ietf-interfaces:interfaces/interface/statistics/out-unicast-pkts
/ietf-interfaces:interfaces/interface/type