Quester, thank you, your solution helped. I have tried everything I could think of to get a proper variable width underline with no success so I will have to settle for what I’ve got. I get 5 underlines under each heading, but at least the columns line up properly when I use: 
push @line, colored(sprintf('%2d', scalar @{$trigraphs{$k}}), 'underli
+ne') . colored(sprintf('%s', $k), 'underline') . colored(sprintf('%-2
+d', scalar keys
%{$flanks{$k}}), 'underline');

[download]
What puzzles me is that It’s possible to get the variable width underline that I want when I use: 
push @line, sprintf('%2s%s%-2s', colored(scalar @{$trigraphs{$k}}, 'un
+derline'), colored($k, 'underline'), colored(scalar keys %{$flanks{$k
+}}, 'underline')
);

[download]
I just don’t know how to get it with the columns lining up.

In reply to Re^4: underline variable width column headings by wlegrand
in thread underline variable width column headings by wlegrand

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