Might as well make it as simple as possible.
latex using TeX fonts, as done in version 2.1 and earlier. In version 2.2
they were instead output as the macros \textendash and \textemdash, causing
changed output with old documents and bugs. The 2.2 behavior can be restored
- by don't allowing using dash ligatures in Document→Settings→Fonts.
+ by don't allowing using dash ligatures in Document->Settings->Fonts.
!!!The following pref variables were added in 2.3: