Add check that common ligatures are set up corrected

Observed behaviour

Some fonts have common ligatures that are misplaced, in liga instead of dlig, and we can have a simple check for these common cases. (Eg https://github.com/google/fonts/issues/1662)

Expected behaviour

Based on the current collection, we can likely do a statistical analysis of what the most common ligatures are in the latin-ext collection and give a recommendation for which OT feature tag they should be in (eg liga vs dlig vs clig etc)

[felipesanches]

yes, @laerm0. I will try to make these changes to the script and I will get back to you shortly with a new version that you can use for that purpose.

[laerm0]

Hey @felipesanches –

So I can handle https://github.com/google/fonts/issues/1662, would it be possible to edit your script so that it outputs font names with their ligature features? Something like tab-/comma-separated text with a header field like fontname,liga,dlig,clig and then an x in the ligature columns so I can paste it into a spreadsheet?