Sadly I think that because of that flag it does not enable ligatures.
I was able to see ligatures and text healing in vim running in a patched st* though. I really like it thanks! The text healing only moves the line subtly as I type and when I cursor over there are no droppings from the widened 'm' for example. It's well thought-out for code.
Are you sure? On OSX they're showing up in Font Book under "Fixed Width" fonts. I'm using whatever version was released today, so that might be a recent fix.
Probably font book decides it's monospaced when verifying the font. I doubt FreeType would consider it mono (that's what matters for GTK2). What's fc-list -v show on your machine under fixed?
I was able to see ligatures and text healing in vim running in a patched st* though. I really like it thanks! The text healing only moves the line subtly as I type and when I cursor over there are no droppings from the widened 'm' for example. It's well thought-out for code.
If I could ask for a feature it would be to select some variants, like angular 0 with reverse slash or to leave the ! in the != ligature. To see what I mean: https://github.com/be5invis/Iosevka/blob/main/doc/stylistic-...
* https://st.suckless.org/patches/ligatures/