用bash创建的文件中的奇怪符号

Question

当我执行以下bash脚本时。我在输出中得到了奇怪的名称文件

Traceback (most recent call last):
  File "/apps/django/myapp/tasks.py", line 336, in _safe_mysqldump
    "mysqldump {} {}".format(mysql_args, cmd), shell=True
  File "/usr/lib/python3.6/subprocess.py", line 291, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: 
Command 'mysqldump -ufoo -pMYSECRETPASSWORD myappdb t1 t2 t3...' returned non-zero exit status 6.

During handling of the above exception, another exception occurred:

etc.

以下输出：

#!/bin/bash  
for file in `cat *and*.txt` 
do
./AT.pl $1 $2 $file  | sed 's/ //g'  > $file
done    

当我用echo命令替换“ ./AT.pl $ 1 $ 2 $ file | sed's / // g'> $ file”时。结果是正常的。

我不知道这是哪里来的？请帮助我

谢谢你， 谭阮