[vile] small glitch in `ksh' syntax filter

[j. van den hoff]

there is a special syntax construct in `ksh', not present in `bash' and  
`zsh', namely command substitution w/o using a sub-shell, eg. something  
like this

res=${ fun "$*";}

note that at least one blank after `{' is mandatory as is the `;' (w/ or  
w/o leading and/or trailing white space) before the closing `}' -- just  
the same  requirements as in boolean expressions such as `[[ somthing ]]  
|| { other things ;}'.

vile's syntax filter is quite confused after encountering the above  
command substitution. It would be good if this corner case where handled  
correctly by the `ksh' syntax filter.

observed with vile version 9.8o.

thanks for vile,

joerg
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