I don't think your match is doing what you think. You've written in your if statement:

$line=/-\s/;
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which is equivalent to

$line = ($_ =~ /-\s/);
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Here's an easier way to get what you want, assuming that you want to match from the first hyphen to the first closing brace after that hyphen:

my ($excerpt) = $line =~ /-([^)]+\))/;
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The variable $excerpt will now hold the value you want, without having to monkey around with the magic $` and $' variables (which impose a performance penalty on your entire program). You also go down from three matches to one.