[$fullspec]
[ $prefix :// $suffix | $title ]
$linkspec= "$prefix://$suffix"
$escsuffix= $q->escape($suffix) # URL-encoded

##</code><code>##

( $url ) # The most common case, uses $suffix as default title
( $url, $deftitle ) # Alternate default title
( '', $html ) # No separate URL; avoid this if possible
( ) # $linkspec was invalid, $q->escapeHTML("[$fullspec]") used

##</code><code>##

"http://lyrics.org/?song=$escsuffix"

##</code><code>##

( "http://lyrics.org/?song=$escsuffix", $q->escapeHTML($linkspec) )