v3.8.2

• [kernFeatureWriter] Fixed variable kern writer emitting phantom values when a glyph-to-class kerning exception present in only some masters overlapped a class-to-glyph exception on a shared kerning-matrix cell. Glyph-to-class exceptions are now resolved per cell rather than per pair key (#988, #990). The fix covers both the default writer and the legacy kernFeatureWriter2, which now share the variable kerning extraction (#989).