Regression on case-insensitive search of russian text in PDF documents
When searching for russian text in default (case-insensitive) mode, evince returns no results, unless case-sensitive search option is turned on. Other non-ASCII7 languages might be affected by this bug as well.
It can be reproduced by searching for eg. простой in this test PDF file.
Regression was introduced by my IgnoreDiacritics option commit, my apologies for that, I'm attaching a MR that fixes it.
Downstream issue is https://gitlab.gnome.org/GNOME/evince/issues/1116