Moving this from a downstream bug report:
https://bugzilla.redhat.com/show_bug.cgi?id=1413807

Description of problem:

a) Forwarding any email inverts the order of the email header to:

-------- Forwarded Message --------

Date: Sun, 09 Oct 2016 13:07:55 +0000
Subject: [Bug 1375645] Evolution is inserting Non-breaking space
instead of Space at the start of lines even with  "Preformatted" set
To: user@no.where
From: bugzilla@redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=1375645

b) There's no space/separation between the email header and the email content.


Version-Release number of selected component (if applicable):

* Fedora 25
* evolution-3.22.3-2.fc25.x86_64

How reproducible:

* Always

Steps to Reproduce:
1. Pick an email and press forward.

Actual results:

Date: Sun, 09 Oct 2016 13:07:55 +0000
Subject: [Bug 1375645] Evolution is inserting Non-breaking space
instead of Space at the start of lines even with  "Preformatted" set
To: user@no.where
From: bugzilla@redhat.com

Expected results:

From: bugzilla@redhat.com
To: user@no.where
Subject: [Bug 1375645] Evolution is inserting Non-breaking space
instead of Space at the start of lines even with  "Preformatted" set
Date: Sun, 09 Oct 2016 13:07:55 +0000