Removing Strange Characters and Black Question-marks from templates

Looking at the template below and it appears as though the code has some tags copied over from a Microsoft program. 

Firstly, removing the black question marks  within the template (see below) is just a matter of hitting backspace on your keyboard.

Regarding the ones that appear within a test email (see below) these have been caused by code copied over from what looks to be a Microsoft program. 

If you have a look at the HTML code of the email there are sections with <!—{if…. (see highlighted sections below) these all need to be removed and that should resolve the issue for you.