Type and spacing issues #16

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Bug Metadata

• • Using latest supported version of extract_msg
• Your python version: Python 3.6.7
• How did you launch extract_msg?
  • [x ] My command line or
  • I used the extract_msg package

Describe the bug
There are tabs present in messages.py
Line 607 has the wrong variable in the parameters. Should be customPath, not custom.

[ If applicable ]
**What code did you use or can we use to reproduce this error?

def save_attachments(self, contentId=False, json=False, useFileName=False, raw=False, customPath=None):
       """
       Saves only attachments in the same folder.
       """
       for attachment in self.attachments:
           attachment.save(contentId, json, useFileName, raw, custom)

Is there a message.msg file you want to share to help us reproduce this?

• Uploaded message (drag and drop on this window)
• Emailed message as an attachment to admins: [Enter Subject Line Here]

Traceback

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Additional context
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