In trying to justify text I found that the last short line of a para, if containing only a few words, was distorted in that these few words were spread over the whole page width.

After 2 days experimentation I found that if I placed the cursor at the RH end of the short (distorted) line and pressed Ctrl + Delete twice then the line reverted to its correct spacing between individual words but the next para now followed on from the first on the same line. So re-position cursor at end of desired first para and hit line/para space to re-create next para as originally 0 but note that there will probably be a space before the first word of second para which now needs deleting.

Good luck!