doc: Change the multitable rendering in texi2pod

Makes it working better for our documentation purposes.

doc/texi2pod.pl

@@ -277,6 +277,14 @@ INF: while(<$inf>) {
         $_ = "\n=over 4\n";
     };
 
+    /^\@(multitable)\s+{.*/ and do {
+        push @endwstack, $endw;
+        push @icstack, $ic;
+        $endw = $1;
+        $ic = "";
+        $_ = "\n=over 4\n";
+    };
+
     /^\@((?:small)?example|display)/ and do {
         push @endwstack, $endw;
         $endw = $1;
@@ -293,10 +301,10 @@ INF: while(<$inf>) {
 
     /^\@tab\s+(.*\S)\s*$/ and $endw eq "multitable" and do {
         my $columns = $1;
-        $columns =~ s/\@tab/ : /;
+        $columns =~ s/\@tab//;
 
-        $_ = " : ". $columns;
-        $section =~ s/\n+\s+$//;
+        $_ = $columns;
+        $section =~ s/$//;
     };
 
     /^\@itemx?\s*(.+)?$/ and do {