doc: expansions: Fix bad asciidoc syntax for kak_command_fifo
doc: expansions: Fix bad asciidoc syntax for kak_command_fifo

alexherbo2/kakoune,alexherbo2/kakoune,casimir/kakoune,mawww/kakoune,casimir/kakoune,casimir/kakoune,jkonecny12/kakoune,lenormf/kakoune,lenormf/kakoune,lenormf/kakoune,alexherbo2/kakoune,lenormf/kakoune,jkonecny12/kakoune,alexherbo2/kakoune,mawww/kakoune,casimir/kakoune,jkonecny12/kakoune,mawww/kakoune,jkonecny12/kakoune,mawww/kakoune