MIN Update schedule
ENH Mention that 'n' searches for next match
As noted by @r-gaia-cs on github, the first hit for '-t' is not the
best one and the user must keep searching.
ENH Improvements & fixes
ENH Add apropos challenge & wording fix
MIN Fix Markdown code
ENH Add challenges
guide-shell/man: rudimentary man lesson
This commit includes work from David Worth.