I got this simple problem when i enabled Clean url and installed path auto Module.
when i open my article i was getting the below url with word " Content" in it.
instead i wanted the url to look like below
All you have to do is Admin -> Configuration -> SEARCH AND METADATA -> URL aliases -> Patterns -> Content path
For more clarity read it here https://www.drupal.org/node/455528 [ Read solution given by :- dbeall ]