Deal with unusual IFS settings in the shell scripts for linux standalone and OSX app.

Thanks, Yaroslav Halchenko

standalone/linux/skel/runshell

@@ -4,6 +4,9 @@
 
 set -e
 
+orig_IFS="${IFS}"
+unset IFS
+
 os="$(uname -o 2>/dev/null || true)"
 base="$(dirname "$0")"
 
@@ -238,6 +241,11 @@ else
 	cmd=sh
 fi
 
+if [ -n "${orig_IFS}" ]; then
+	IFS="${orig_IFS}"
+	export IFS
+fi
+
 if [ -z "$tbase" ]; then
 	if [ "$useproot" ]; then
 		exec proot "$cmd" "$@"