Problem description

The "fi" and "fl" glyphs that exist with Unicode values are rendering in an unexpected way in the Rec Mono for Code fonts. This is partly due to the code ligature calt code not including fi, but partly that the Unicode fi should be only a single unit of space. It’s more of a concept than a character intended for actual use.

0xFB01 fi LATIN SMALL LIGATURE FI # renders double-wide
0xFB02 fl LATIN SMALL LIGATURE FL # missing from font

Fix it!