Commit 5587247d5bb46e3ff5d0c4601b145dfbae50e27c
2023-08-23T21:54:15
[repacker] create only one extension subtable per physical subtable. During extension promotion when multiple lookups refer to a shared subtable node create and reuse a single extension subtable for it. Fixes: https://github.com/fonttools/fonttools/issues/3260.