Bug#618947: Evince fails on copying to clipboard/searching in some cases

[boskar]

Package: evince
Version: 2.30.3-3

When i try to copy some polish text from pdf the text changes.
- letter "ć" is changed to "d" (next ascii letter after "c")
- letter "ń" is changed to "o" (next ascii letter after "n")

Also, text searching in evince works in the same way - if I try to
search string with these letters they are not found correctly, they
are found when I enter d or o instead of ć/ń.

The problem appears does not appear in headers and in text written in
capitals, and these letters need to be at the end of a word.