Line-breaks in Text column of CSV file
This is probably due to the fact that the text has Carriage Returns in it and that you are using the default row delimiter which is the Carriage Return.

This will be tough to fix since you can't know when a Carriage Return is part of a column or actually a new line. the file needs to be fixed manually. 

Unless you know where the file came from...  If there's a possibility  for you to reprocess the file, then I would reprocess it, replacing all Carriage Returns found in columns by blanks ('').

I hope this helps.