Update sig parsing

[summera]

No description provided.

[summera]

Ran into a situation where there was no line separating the signature and the reply like so:

Outlook with no line below reply

From: CRM Comments [crm-comment@example.com]
Sent: Friday, 23 March 2012 5:08 p.m.
To: John S. Greene
Subject: [contact:106] John Greene

I don't like putting lines above my signature!

This solves that 😜

[krzysiek1507]

Is this one already solved?

[TBG-FR]

Thanks for that PR !