Auto non-breaking space filter

Auto change spaces after chosen one-letter conjunctions and prepositions or words into non-breaking space –  
You can specify single characters and words after wchich space will be changed into non-breaking space.
One-letter conjunctions and prepositions (a, i, u, w, etc.) may remain at the end of the line in continuous text, while in book titles and their chapters they should be moved to the next line.
This principle is generally known. If a one-letter conjunction or preposition (i.e. so-called orphan, pendant, or hanging conjunction), type a, i, u, w, etc., appears at the end of a line. – It is better to move it to the next line. Leaving such words at the end of the line is not a mistake, but in practice it has been accepted to always move them, not only in the titles. It simply looks more aesthetic.
This filter changes all spaces between selected single character (like `a i o u w z`) to an ` `
It is specially non-estetic on Polish sites.
So paragraph like this:
> The quick brown fox jumps over a
> lazy dog.
Will be displayed as:
> The quick brown fox jumps over
> a lazy dog.
You can also enable function that changes spaces after or/and before selected words into hard spaces.