Description of problem: The cal man page uses "<" and ">" for grouping. The standard since forever (and still documented in the current SUS/POSIX standard) is to use "{" and "}" for grouping when one of several items is required. Version-Release number of selected component (if applicable): How reproducible: Steps to Reproduce: 1. man cal 2. 3. Actual results: cal [options] <timestamp|monthname> Expected results: cal [ options ] { timestamp | monthname } Additional info: The Fedora 27 man(1) and man-pages(7) don't document any grouping syntax, except for "[" and "]". They should probably have a sentence added; let me know if the assignee needs me to create a separate bug for those man pages. (I realize this is extremely low priority, but should be a very quick painless fix. Correct documentation syntax is important to new users.)
Good point. We do not use '{ }' in util-linux. It seems better to use cal [ options ] [timestamp|monthname] to be compatible with another our man pages. I'll fix it in upstream tree. Thanks!
Note that timestamp and monthname are not required, all is optional.