termcol: fix index numbers of 88-colour greyscale ramp

Loop with sequence number so index can be derived.  Replace measured colour
values with equivalent algorithm.

diff --git a/termcol.plp b/termcol.plp
index 10d68ac50f80006ecbf507a50e36ded908025665..ee27125c8856b8dcd9c426ccb3bd18bec785b0d9 100644 (file)
--- a/termcol.plp
+++ b/termcol.plp
@@ -104,7 +104,7 @@ for my $r (0 .. 3) {
 print "\n";
 
 print '<table><tr>';
-print colcell(80, ($_) x 3) for 46, 92, 115, 139, 162, 185, 208, 231;
+print colcell(80+$_, (($_ + 2 + ($_>0)) * 255/11) x 3) for 0 .. 7;
 print "</table>\n\n";
 
 :></div>