Node:option, Next:dfn, Previous:command, Up:Indicating
@option{option-name}Use the @option command to indicate a command-line option; for
example, -l or --version or
--output=filename.
@option is equivalent to @samp in its effects. 
For example:
The option @option{-l} produces a long listing.
 produces
The option -l produces a long listing. 
In tables, putting options inside @code produces a
more pleasing effect.