-while (my ($browser, $target) = each %BROWSERJOIN) {
- my $agent1 = delete $data->{agents}->{$browser} or next;
- my $agent2 = $data->{agents}->{$target} or next;
- push @{ $agent2->{version_list} }, @{ $agent1->{version_list} };
- $agent2->{browser} = sprintf '%s (former %s)',
- $agent1->{browser}, $agent2->{browser};
+while (my ($browser, $alias) = each %BROWSERJOIN) {
+ my $agent = $data->{agents}->{$browser} or next;
+ my $amend = delete $data->{agents}->{$alias} or next;
+ unless ($agent->{prefix} eq $amend->{prefix}) {
+ $_->{prefix} ||= $amend->{prefix} for @{ $amend->{version_list} };
+ }
+ unshift @{ $agent->{version_list} }, @{ $amend->{version_list} };
+ $agent->{browser} = sprintf '%s (former %s)',
+ $agent->{browser}, $amend->{browser};
+
+ # prefer deprecated name if newer is convoluted (Chr/And.)
+ $agent->{abbr} = $amend->{abbr} if $agent->{abbr} =~ m{/};