- suggestions.ml : improve details + algorithm implementation (see @Altgr reviews) + comments
- suggestions implementation : since we want to keep the same structure to display suggestion messages, Suggestion is no longer a formatted string but a string list. The goal is to have a similar formatted string for each suggestion, no matter what the error message is.
--> This involves changes to suggestions.mli, compiler/desugared/from_surface.ml (most important one) and compiler/surface/parser_driver.ml