Hi,

Can anybody Ok that this patch correctly handles the cases of `No' and 
`Ns' with respect to spacing and without fallout?  Cf. TODO items

- .No text No ) is "text )", not "text)"
   see the terrible example
     case word in [[(]  pattern [| pattern] ... ) list ;; ] ... esac
   in OpenBSD ksh(1)

- .It ${name Ns [ selector ] Ns }
   should be "${name[selector]}" not "${name [selector]}"
   This is parsed as
   text("${name") text("[") Ns() text(selector)...
   Opening punctuation should not fall out of .Ns.
   see for example OpenBSD csh(1)

Note that the ellipsis suppresses whitespace because of the trailing 
period.  This is a new TODO.

Kristaps