diff --git a/docs/cmdline-opts/gen.pl b/docs/cmdline-opts/gen.pl
index 6fe24be1e7..c8b129360b 100755
--- a/docs/cmdline-opts/gen.pl
+++ b/docs/cmdline-opts/gen.pl
@@ -210,8 +210,9 @@ sub single {
     }
     if($foot[0]) {
         print "\n";
-        print @foot;
-        print "\n";
+        my $f = join("", @foot);
+        $f =~ s/ +\z//; # remove trailing space
+        print "$f\n";
     }
     return 0;
 }