After upgrading to Fedora 29 konsole has started to use ligatures for my monowidth fonts (currently Inconsolata), which is beyond terrible for example when it decides to combine "fi". I have futzed with fontconfig tweaks like the following, to no avail:
$ cat ~/.config/fontconfig/fonts.conf
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
<description>Disable ligatures for monospaced fonts to avoid ff, fi, ffi, etc. becoming only one character wide</description>
<match target="font">
<test name="family" compare="contains" ignore-blanks="true">
<string>Inconsolata</string>
</test>
<edit name="fontfeatures" mode="append">
<string>liga off</string>
<string>dlig off</string>
</edit>
</match>
</fontconfig>
I can work around it by switching fonts, but this behavior is just unhelpful. How do I properly prevent konsole from using any kind of ligatures for my fonts?