Tighten formatting: set synopsis syntax characters adjacently to
operands. Rename `-d` option argument from "directory" to
"playground-directory" for clarity.
Set operands more idiomatically. They are not given in pairs; instead
"base" can be repeated arbitrarily. See, for example, the POSIX
reference page for ls(1).
https://pubs.opengroup.org/onlinepubs/9799919799/utilities/ls.html
Format ellipsis idiomatically.
groff_man_style(7):
Notes
... The idiomatic roff ellipsis is three dots (periods) with thin
space escape sequences \| internally separating them. Since dots
both begin control lines and are candidate end‐of‐sentence
characters, however, it is sometimes necessary to prefix and/or
suffix an ellipsis with the dummy character escape sequence \&.
G. Branden Robinson
2d3f9b8c21