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diff -up tcsh-6.17.00/tw.color.c_old tcsh-6.17.00/tw.color.c
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--- tcsh-6.17.00/tw.color.c_old	2009-07-20 14:35:59.000000000 +0200
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+++ tcsh-6.17.00/tw.color.c	2009-07-20 14:36:54.000000000 +0200
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@@ -86,6 +86,7 @@ static Variable variables[] = {
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     VAR(NOS, "ow", ""),		/* Other writable dir (o+w) but not sticky */
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     VAR(NOS, "st", ""),		/* Sticky dir (+t) but not other writable */
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     VAR(NOS, "rs", "0"),	/* Reset to normal color */
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+    VAR(NOS, "ca", ""),		/* file with capability */
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 };
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 enum FileType {