Copyright string check / OFL copyright mismatch error

I get the following error when running QA from Glyphs (Version 2.5.1 (1141)) "OFL.txt and font copyright do not match." when as far as I can tell, they are functionally the same. Have checked for hidden characters etc; and not found anything amiss. Copyright is on first line of OFL.txt.

Strings in question below;

OFL copyright: Copyright 2018 The Turret Road Project Authors (https://github.com/noponies/turret-road)
Font copyright: Copyright 2018 The Turret Road Project Authors (https://github.com/noponies/turret-road)

Start by reproducing the QA run from Glyphs 2.5.1 (1141) using the OFL.txt and font copyright strings shown in the issue. Trace how the QA check compares these values and confirm that functionally identical copyright text is accepted. Done means the reported mismatch no longer occurs for this case.

Written by the indexing model from the issue text.