add zero width non-joiner between compressed syllables

[akobel]

Title says it all - AFAIK, no ligatures should be set across boundaries of syllables (e.g., to mention a German example, in "Kaufleute" no fl-ligature should be used).

[uliska]

Can't look at it right now, but from the description it sounds great. Of course it is at a different point in tge process but I am always annnoyed that LaTeX diesn't do that reliably (OK, don't start talking about other software ...) -- Diese Nachricht wurde von meinem Android-Mobiltelefon mit K-9 Mail gesendet.