问Linux期望值。如何删除"log_user 0“的第一行空白行？

EN

#!/usr/bin/expect

log_user 0
set timeout 10

if {[llength $argv] == 0} {
  send_user "Usage: sshpwd \'password\' ssh ...\n"
  exit 1
}

set cmd [lrange $argv 1 end]
set pwd [lindex $argv 0]

eval spawn $cmd
expect {
    "*yes/no*" { send "yes\r" ; exp_continue }
    "*assword:" { send "$pwd\r"; interact; }
}

username@localhost:~$ ./sshpwd.exp password ssh username@localhost "(echo \"123\") && date '+%Y.%m.%d' && echo [TEST]"

123
2016.04.06
[TEST]

username@localhost:~$ ./sshpwd.exp password ssh username@localhost "(echo \"123\") && date '+%Y.%m.%d' && echo [TEST]"
spawn ssh username@localhost (echo "123") && date '+%Y.%m.%d' && echo [TEST]
username@locahost's password:
123
2016.04.06
[TEST]

username@localhost:~$ ./sshpwd.exp password ssh username@localhost "(echo \"123\") && date '+%Y.%m.%d' && echo [TEST]"
123
2016.04.06
[TEST]