[DOCS] [MLLIB] Fixing misformatted links in v1.4 MLlib Naive Bayes documentation by removing space and newline characters.

A couple of links in the MLlib Naive Bayes documentation for v1.4 were broken due to the addition of either space or newline characters between the link title and link URL in the markdown doc.  (Interestingly enough, they are rendered correctly in the GitHub viewer, but not when compiled to HTML by Jekyll.)

Author: Mike Dusenberry <dusenberrymw@gmail.com>

Closes #6412 from dusenberrymw/Fix_Broken_Links_In_MLlib_Naive_Bayes_Docs and squashes the following commits:

91a4028 [Mike Dusenberry] Fixing misformatted links by removing space and newline characters.