Addresses this issue: https://bugs.winehq.org/show_bug.cgi?id=53985#add_comment
This is done by adding three characters into Tahoma that are missing. I achieved this by replacing the characters with similar shape from within the same font (e.g. + for U+FF0B) or by getting the font from a font that had an open source license (liberation2) in the case of U+25BC.
Once I had that done, I regenerated the font by running the following command:
``` fontforge -script fonts/genttf.ff fonts/tahoma.sfd fonts/tahoma.ttf ```
The image below shows the issue as reported by gatlibs:

The image below shows the fix:
