scripts/flashing/flash.sh: remove trailing whitespaces

Signed-off-by: Rosen Penev <rosenp@gmail.com>
[cut out of patch with different subject]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

scripts/flashing/flash.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 #
-# tftp flash script for wireless routers 
+# tftp flash script for wireless routers
 #
 # Copyright (C) 2004 by Oleg I. Vdovikin <oleg@cs.msu.su>
 # Copyright (C) 2005 by Waldemar Brodkorb <wbx@openwrt.org>
@@ -24,10 +24,10 @@ if [ -z "$1" ] || [ ! -f "$1" ] || [ -z "$2" ]; then
     echo Usage: "$0" firmware vendor
 cat << EOF
 IMPORTANT:
-Notes for Linksys / Asus WL500gx router: 
+Notes for Linksys / Asus WL500gx router:
    be sure you have set boot_wait to yes. Power on your router
    after executing this script.
- 
+
 Notes for Asus WL500g router:
    be sure POWER led is flashing (If this is not the case
    poweroff the device, push the reset button & power on
@@ -54,7 +54,7 @@ echo Confirming IP address setting...
 echo -en "get ASUSSPACELINK\x01\x01\xa8\xc0 /dev/null\nquit\n" | tftp 192.168.1.1
 echo Flashing 192.168.1.1 using "$1"...
 echo -en "binary\nput $1 ASUSSPACELINK\nquit\n" | tftp 192.168.1.1
-echo Please wait until leds stops flashing. 
+echo Please wait until leds stops flashing.
 elif [ "$2" = "linksys" ]; then
 echo Flashing 192.168.1.1 using "$1"...
 echo -en "rexmt 1\ntrace\nbinary\nput $1\nquit\n" | tftp 192.168.1.1