执行shell脚本遇到错误syntax error: unexpected "then" (expecting "}")

今天执行脚本的时候遇到错误，如下图：

root@ApFree:/usr/sbin# ./conntrack_num_graph.sh 
./conntrack_num_graph.sh: line 9: syntax error: unexpected "then" (expecting "}")
root@ApFree:/usr/sbin# 

我就纳闷了，这个脚本几天前是能正常执行的，今天执行怎么会出错，why?

cat脚本一看如下：

#!/bin/sh
SITENAME="apfree"聽聽聽聽聽 # change for your site
mkdir -p /mnt/rrd 
#iptables -L traffic -vnxZ -t filter > /tmp/traffic.tmp
# $1 = ImageFile, $2 = Time in secs to go back, $3 = RRDfile, $4 = GraphText
CreateGraph ()
{
聽聽聽聽聽聽聽聽# only run, if no other rrdtool is running
聽聽聽聽聽聽聽聽if [ -n "$(ps | grep rrdtool | grep -v grep)" ];then
                        return
聽聽聽聽聽聽聽聽fi
聽
聽聽聽聽聽聽聽聽rrdtool graph "${1}" -a PNG -s -"${2}" -w 550 -h 240 -v "" 
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽'DEF:count='${3}':conntrack_count:AVERAGE' 
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽'AREA:count#32CD32:Conntrack number' 
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽'HRULE:0#000000' -t "${4}"
}
聽
# build sum-graph
if [ ! -e /mnt/rrd/conntrack_num.rrd ] ; then
聽聽聽聽聽聽聽聽rrdtool create /mnt/rrd/conntrack_num.rrd -s 300 
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽DS:conntrack_count:GAUGE:600:0:600000000 
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽RRA:AVERAGE:0.5:1:600
fi
CONNTRACK_COUNT=`cat /proc/sys/net/netfilter/nf_conntrack_count`
rrdtool update /mnt/rrd/conntrack_num.rrd N:$CONNTRACK_COUNT
CreateGraph /mnt/rrd/conntrack_num.png 86400 /mnt/rrd/conntrack_num.rrd "conntrack from $SITENAME"

尼玛，这下才明白，有乱码！怪不得会出错呢！

为什么会有乱码呢？哦，原来是因为我之前把这个脚本删除了，然后从麦库记事本上把代码直接copy过来重新建立的脚本，才会出现这种情况！

解决办法：把乱码全部删除掉，再执行，就ok了，只不过这样真心很麻烦呀，如果看官们有更方便的办法，还请告诉我呀。