when writing or modifying command usage strings and synopsis sections
in the manual pages:
- Placeholders are enclosed in angle brackets:
+ Placeholders are spelled in lowercase and enclosed in angle brackets:
<file>
--sort=<key>
--abbrev[=<n>]
- Possibility of multiple occurences is indicated by three dots:
+ Possibility of multiple occurrences is indicated by three dots:
<file>...
(One or more of <file>.)