Detruncate the sentences

[Mte90]

I downloaded a few books but I see that often the sentence is splitted in few lines.
So I was wondering if it is a way to rebuild the original sentence in a way that there is a sentence with an uppercase letter and a dot (or a question dot etc).
Example:

Savio di terraferma alla scrittura e le magistrature
Le armi nel loro complesso, il governo ed
il riparto difensivo e territoriale.

to

Savio di terraferma alla scrittura e le magistrature
Le armi nel loro complesso, il governo ed il riparto difensivo e territoriale. 

[coreybobco]

I had forked this repo to change that along with one other thing I needed for my use case (making replacing deletions with "[deleted]" optional. I have just made a pull request with both changes. My fork is presently available here: github.com/coreybobco/gutenberg_cleaner

[Mte90]

I saw the pr but I think that will generate a text like:

Savio di terraferma alla scrittura e le magistrature Le armi nel loro complesso, il governo ed il riparto difensivo e territoriale. 

Instead sentences with an uppercase letter should stay in a specific line. I was trying to do an algorithm for that but I think that with a regex is possible to it.