mmv -a does not work

[Xavier Roblot]

I installed the following:

mmv/stable,now 1.01b-19 armhf

and mmv -a zap zap2 does not append zap file to zap2 file as it should:

pi@raspberrypi:~ $ dd if=/dev/random of=zap count=5000
0+5000 records in
536+1 records out
274936 bytes (275 kB, 268 KiB) copied, 6.60265 s, 41.6 kB/s
pi@raspberrypi:~ $ dd if=/dev/random of=zap2 count=5000
0+5000 records in
534+1 records out
273816 bytes (274 kB, 267 KiB) copied, 6.62028 s, 41.4 kB/s
pi@raspberrypi:~ $ ls -lh zap zap2
-rw-r--r-- 1 pi pi 269K Nov 14 07:43 zap
-rw-r--r-- 1 pi pi 268K Nov 14 07:44 zap2
pi@raspberrypi:~ $ mmv -a zap zap2
pi@raspberrypi:~ $ ls -lh zap zap2
-rw-r--r-- 1 pi pi 269K Nov 14 07:43 zap
-rw-r--r-- 1 pi pi 268K Nov 14 07:44 zap2

On my other Unix machine, I get

roblot$ ls -lh zap zap2
-rw-r--r-- 1 roblot staff 2.4M Nov 14 07:44 zap
-rw-r--r-- 1 roblot staff 2.4M Nov 14 07:44 zap2
roblot$ mmv -a zap zap2
roblot$ ls -lh zap zap2
-rw-r--r-- 1 roblot staff 2.4M Nov 14 07:44 zap
-rw-r--r-- 1 roblot staff 4.9M Nov 14 07:46 zap2