GNOME Bugzilla – Bug 773214
Whitespace drawing: tab not drawn correctly if followed by narrowed non-breaking space
Last modified: 2016-10-19 12:42:14 UTC
I'll attach a screenshot. The cairo calls for the narrowed nbsp affect previous characters.
Created attachment 338006 [details] Screenshot showing the bug
Fixed with commit 01a993eba151906ce33e37ed5f00fd93b54e370c.