Earlier quoted context omitted.
It always bugs me that _underscore_ is the syntax for italics rather than underline. I’m sure back in the old days of READMEs, long before markdown was a thing, the conventions were this: /italics/ _underline_ *bold*
My /usr/bin/ folder wants to know which bit gets italicised :)
You put in in ~code~ or =verbatim= markup, thusly: =/usr/bin/=