Only strip re-echoed command from switch output, not the first line
Only strip re-echoed command from switch output, not the first line

Stripping the first line is not an issue when running commands like
`show ip` that display a whole table that has plenty of \n's to offset
it from the rest of the output, but often commands that only output a
single line don't seem to add a \n before the actual output.

leonhandreke/hpswitch,thechristschn/hpswitch