Use numeric comparison in sort for $displaynum (#2952)
Eg in the case of sockets: - X0 - X99 - X100 X99 would be picked instead of X100.
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@ -87,7 +87,7 @@ sub start_xserver {
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# First get the last used display number, then increment it by one.
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# Effectively falls back to 1 if no X server is running.
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my ($displaynum) = map { /(\d+)$/ } reverse sort glob($x_socketpath . '*');
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my ($displaynum) = reverse sort { $a <=> $b } map{ /(\d+)$/ } glob($x_socketpath . '*');
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$displaynum++;
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say "Starting $parallel Xephyr instances, starting at :$displaynum...";
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