get_maintainers.pl: improve .mailmap parsing

Entries that used formats other than "Proper Name <commit@email.xx>"
were not parsed properly.

Try to improve the parsing so that the entries in the forms of:
    Proper Name <proper@email.xx> <commit@email.xx>
and
    Proper Name <proper@email.xx> Commit Name <commit@email.xx>
are transformed correctly.
Signed-off-by: Joe Perches <joe@perches.com>
Reviewed-by: Florian Mickler <florian@mickler.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

scripts/get_maintainer.pl

@@ -328,7 +328,8 @@ sub read_mailmap {
 	# name1 <mail1> <mail2>
 	# name1 <mail1> name2 <mail2>
 	# (see man git-shortlog)
-	if (/^(.+)<(.+)>$/) {
+
+	if (/^([^<]+)<([^>]+)>$/) {
 	    my $real_name = $1;
 	    my $address = $2;
 
@@ -336,13 +337,13 @@ sub read_mailmap {
 	    ($real_name, $address) = parse_email("$real_name <$address>");
 	    $mailmap->{names}->{$address} = $real_name;
 
-	} elsif (/^<([^\s]+)>\s*<([^\s]+)>$/) {
+	} elsif (/^<([^>]+)>\s*<([^>]+)>$/) {
 	    my $real_address = $1;
 	    my $wrong_address = $2;
 
 	    $mailmap->{addresses}->{$wrong_address} = $real_address;
 
-	} elsif (/^(.+)<([^\s]+)>\s*<([^\s]+)>$/) {
+	} elsif (/^(.+)<([^>]+)>\s*<([^>]+)>$/) {
 	    my $real_name = $1;
 	    my $real_address = $2;
 	    my $wrong_address = $3;
@@ -353,7 +354,7 @@ sub read_mailmap {
 	    $mailmap->{names}->{$wrong_address} = $real_name;
 	    $mailmap->{addresses}->{$wrong_address} = $real_address;
 
-	} elsif (/^(.+)<([^\s]+)>\s*([^\s].*)<([^\s]+)>$/) {
+	} elsif (/^(.+)<([^>]+)>\s*(.+)\s*<([^>]+)>$/) {
 	    my $real_name = $1;
 	    my $real_address = $2;
 	    my $wrong_name = $3;