(shell-mode): Don't assume /dev/null is its own truename.
tree150b479123838a4b490e78eb0562195d62565061
-rw-r--r-- 4558 GETTING.GNU.SOFTWARE
-rw-r--r-- 27966 INSTALL
-rw-r--r-- 19748 Makefile.in
-rw-r--r-- 30940 PROBLEMS
-rwxr-xr-x 4762 build-ins.in
-rw-r--r-- 7497 config.bat
-rwxr-xr-x 18388 config.guess
-rwxr-xr-x 18359 config.sub
-rw-r--r-- 46626 configure.in
-rwxr-xr-x 50350 configure1.in
drwxr-xr-x - etc
drwxr-xr-x - lib-src
drwxr-xr-x - lisp
drwxr-xr-x - lispref
drwxr-xr-x - lwlib
-rwxr-xr-x 14248 make-dist
drwxr-xr-x - man
drwxr-xr-x - msdos
drwxr-xr-x - nt
drwxr-xr-x - src
-rw-r--r-- 7525 tparam.c
-rw-r--r-- 219 vpath.sed