Fix small paragraphs for lettrines

[swfsql]

The DroppedCapital letter, at start of texts, can overlap the next paragraph if the first is too small:

It is needed for the script to verify, and try guessing if it's a small paragraph. If it is, one or two line insertion
at the beggining of the next paragraph should do it.

Moved from ancap-ch/from-en#996