On Fri, 22 Apr 2016 10:07:49 +0100 Dimitris Papastamos <[email protected]> wrote:
> On Fri, Apr 22, 2016 at 03:24:47AM +0200, Mattias Andrée > wrote: > > Also in man page: [-r | -s | -w] => (-r | -s | -w) > > > > Signed-off-by: Mattias Andrée <[email protected]> > > I know this pattern already exists in some core tools. > Can you clarify why it is clearer? I am not even sure > what it means anymore. I have never used (-a | -b). > [ ] implies that it is optional. ( ) is rarely used, but it does appear on some man pages, it is only used to imply that the alternation is group. This is to avoid ambiguity: is the [-u] grouped with -w or is it grouped with the whole alternation.
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