This is caused by the addition of pseudo-elements to attribute selectors; probably something like this:
a[href*="/"]:after, a[href*="/"]:visited:after {content: "("attr(href)")";}
You can most likely override this by dropping the contents of the pseudo-element.
Try adding the following to your print style sheet:
a[href*="/"]:after, a[href*="/"]:visited:after {content: normal;}
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