compat: Add simplified merge sort implementation from glibc

diff --git a/git-send-email.perl b/git-send-email.perl
index 6c72952fcc09934a4e710be733b4926a9e5a2658..a1a9d14b00d01844509a87c598314e2ffbbfa47c 100755 (executable)
--- a/git-send-email.perl
+++ b/git-send-email.perl
@@ -462,7 +462,7 @@ sub expand_aliases {
                exit(0);
        }
 
-       @files = ($compose_filename . ".final");
+       @files = ($compose_filename . ".final", @files);
 }
 
 # Variables we set as part of the loop over files