'sort F -o F' no longer needs to copy F.
tree396f078d9d19286917b6c8800860f0f40b6b1a3c
-rw-r--r-- 11651 ABOUT-NLS
-rw-r--r-- 17992 COPYING
-rw-r--r-- 1003 GNUmakefile
-rw-r--r-- 7831 INSTALL
-rw-r--r-- 5891 Makefile.maint
-rw-r--r-- 17493 THANKS
drwxr-xr-x - doc
drwxr-xr-x - lib
drwxr-xr-x - m4
drwxr-xr-x - man
drwxr-xr-x - old
drwxr-xr-x - po
drwxr-xr-x - src
drwxr-xr-x - tests