fix for verbatim

[Hans Hagen <pragma@wxs.nl>]

The following patch

\unprotect

\let\protectedfirsttype\string

\bgroup
\catcode`\[=\@@begingroup
\catcode`\]=\@@endgroup
\catcode`\{=\@@active
\catcode`\}=\@@active
\gdef\initializetypegrouping%
  [\catcode`\{=\@@active
   \catcode`\}=\@@active
   \let\normalactivebgroup{%
   \let\normalactiveegroup}%
   \def\activeleftargument%
     [\bgroup
      \let}\activerightargument
      \normalactivebgroup
     ]%
   \def\activerightargument%
     [\normalactiveegroup
      \egroup]%
   \let{=\activeleftargument
   \let}=\egroup
  ]
\egroup

\protect

works ok for

\setupcolors[state=start]
\setuptype[option=color]
\setuptyping[option=color]
\setupwhitespace[big]

\starttext

\starttyping
x\pdfoutput{xx} {nn}
\pdfoutput{xx} {nn}
\stoptyping

\type{x\pdfoutput {xx} {nn}}
\type{x\pdfoutput{xx} {nn}}
\type{x\pdfoutput{xx} {nn}}

\stoptext

but no coloring here:

\starttabulate[|l|]
\NC \type{\pdfoutput {xx}{,,}}  \NC\NR
\NC \type{\pdfoutput{xx}{,,}}  \NC\NR
\NC \type{{xx}{,,}}  \NC\NR
\stoptabulate

beware: since in tabulate args are passed, the { } in \type are seen as 
grouping tokens and disappear.

i'll try to make up a solution (no way around space after \cs then, 
unless taco fixes tex -)

Hans