Improves the help text for the memory-related CLI functions "xe vm-memory-{dynamic,static}-range-set".
Improves the help text for the memory-related CLI functions "xe vm-memory-{dynamic,static}-range-set".

Signed-off-by: Jonathan Knowles <47466d50a94574c6fb872a0e5feec104dcb68f29@eu.citrix.com>

djs55/squeezed,koushikcgit/xcp-rrdd,djs55/xcp-rrdd,johnelse/xcp-rrdd,sharady/xcp-networkd,koushikcgit/xcp-networkd,sharady/xcp-networkd,koushikcgit/xcp-networkd,simonjbeaumont/xcp-rrdd,djs55/xcp-networkd,koushikcgit/xcp-rrdd,koushikcgit/xcp-rrdd,robhoes/squeezed,djs55/xcp-rrdd,johnelse/xcp-rrdd,simonjbeaumont/xcp-rrdd,djs55/xcp-networkd