multikv command can have no fields; we should omit new line (\n)

[keroro824]

eg.
search set_sos_index host="SPLUNK1.EDM.LOCAL" sourcetype="lsof"\n | head 1\n | multikv \n | get_splunk_process_type_lsof

[salspaugh]

This is a weird one -- I thought the newline should be ignored already. Perhaps it is an escaped escape.