Ligatures broken
Nerd Font used to have a 'ligature removal' feature for the `Nerd Font Mono` fonts.
This seems to be broken with recent fonts (i.e. `v2.2.2` seems ok while `HEAD` is broken).
See also
* #934 
* #973 
* #975 

The reason is the recent fix of the ligature removal code (i.e. https://github.com/ryanoasis/nerd-fonts/commit/5d218b1cd305470093734e32fbd3d5fb827ede6f).

History data:

* Ligature removal introduced 02-2018 (`v2.0.0`) 9917e2db
* Ligature removal broken 08-2018 (`v2.1.0`) https://github.com/ryanoasis/nerd-fonts/commit/0a480bbc8d03d226f33e588bc6c0d001571389bc
* Ligature removal fixed 09-2022 (`v2.3.0-RC`) https://github.com/ryanoasis/nerd-fonts/commit/5d218b1cd305470093734e32fbd3d5fb827ede6f

Fonts with ligature table data:

* Arimo (*)
* Cousine                 
* DejaVuSansMono
* FiraCode            
* FiraMono
* Hasklig                  
* Iosevka           
* Lekton
* Monoid                    
* Noto               
* OpenDyslexic (*)
* Overpass
* ShareTechMono      
* SpaceMono          
* Ubuntu (*)

The tables have been added with a2f56206e and never been updated (which would generally be needed if the source font is updated) (except Hasklug 12cd703e3).

Affected (very quick check) is only FiraCode and Hasklig.

Updated after introduction of the ligature removal are

* FiraCode 78be0e1e7 d23d0e008 338497d1e 2d32a1f44 dfc31db1d d9ea69ac6 ad162ace7
* Hasklig e2745c3e4 ca44d3873 6edb95723
* Iosevka a7d8f517e 052ece39a 8738eb476 09c4776ee 6edb95723

Of the three Iosevka's ligature removal seems to have survived the updates, but maybe not.