我用dialog写了个小脚本，没成功和成功后的我看着是一样的，求大神解答！！

用diff，它说有错  我为什么看不出来呢

[root@lcmc ~]# diff -u form1 form2

--- set-network.sh 2015-06-17 20:13:36.731459487 -0400

+++ form2 2015-06-17 19:53:57.107462118 -0400

@@ -13,13 +13,13 @@

 value=`$DIALOG --ok-label "Submit" \

   --form "Here is a possible piece of a configuration program." \

 0 0 10 \

- "1 Device name:"        1 1     "$dev"          1  16 25 15 \

- "2 On boot:"       2 1 "$on_boot"   2  16 25 15 \

- "3 DHCP:" 3 1 "$boot_dhcp" 3  16 15 25 \

- "4 Ip address:" 4 1 "$ipaddr"   4  16 25 15 \

- "5 Netmask:"     5 1 "$netmask" 5  16 25 15 \

- "6 Broadcast:" 6 1     "$broadcask" 6  16 25 15 \ 

- "7 Gateway:" 7 1 "$gateway"   7  16 25 15 \

+ "1 Device name:"        1 1     "$dev"          1  16 25 15 \

+ "2 On boot:"            2 1     "$on_boot"      2  16 25 15 \

+ "3 DHCP:"               3 1     "$boot_dhcp"    3  16 25 15 \

+ "4 Ip address:"         4 1     "$ipaddr"       4  16 25 15 \

+ "5 Netmask:"            5 1     "$netmask"      5  16 25 15 \

+ "6 Broadcast:"          6 1     "$broadcast"    6  16 25 15 \

+ "7 Gateway:"            7 1     "$gateway"      7  16 25 15 \

 2>&1 1>&3`

 return=$?

 exec 3>&-