- default-ligature-mapconstant
An alist of default ASCII sequences that are translated to ligatures by make-fancy-rules.
Contains mappings for 'ffi', 'ffl', 'ff', 'fi', 'fl' and 'ft'. The mapping for 'st' is intentionally left out because this ligature is too elaborate to use in body copy. You could easily define a ruleset for eg headings that does include the 'st' ligature (it's Unicode character fb06).