关于emacs的文档区别：同一个shell内容，复制粘贴后运行结果就不一样了

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如下图：

1.图中
    1.1 “左边”是从网上下的脚本，原本是个压缩包，解压后打开的，文件名：try_var
    1.2“右边”是用“文本编辑器”打开try_var文件后，复制粘贴到emacs里的，并另存为：test.for.temp

2.两者明显“显示”也不一样，而且运行这两个脚本会有不同的结果：
    2.1  try_var（左边相应内容）的运行结果：

Hello
The program ./try_var is now running
The second parameter was
The first parameter was
The parameter list was
The user's home directory is /root
Please enter a new greeting
aaa
': not a valid identifier `salutation
Hello
The script is now complete
./try_var: line 13: exit: too many arguments

    2.2 test.for.temp （右边相应内容）的运行结果

Hello
The program ./test.for.temp is now running
The second parameter was
The first parameter was
The parameter list was
The user's home directory is /root
Please enter a new greeting
aaa
aaa
The script is now complete

3.附：
脚本内容如下：

# !/bin/bash



salutation="Hello"

echo $salutation

echo "The program $0 is now running"

echo "The second parameter was $2"

echo "The first parameter was $1"

echo "The parameter list was $*"

echo "The user's home directory is $HOME"



echo "lease enter a new greeting"

read salutation



echo $salutation

echo "The script is now complete"



exit 0

就不搞不名该两个文档的shell内容一样，为什么就是运行结果会不一样呢？
小弟刚学emacs和shell编程不久，请大虾能够指点一二（emacs version:21.4.1）