Merge pull request #182 from edx/fix-documentation

Fix documentation

analytics_data_api/v0/views/learners.py

@@ -305,7 +305,7 @@ class EngagementTimelineView(CourseViewMixin, generics.ListAPIView):
 
     **Example Request**
 
-        GET /api/v0/engagement_timeline/{username}/?course_id={course_id}
+        GET /api/v0/engagement_timelines/{username}/?course_id={course_id}
 
     **Response Values**
 

docs/apiary/apiary.apib

@@ -18,9 +18,9 @@ All URLs are prefixed with a version number. The version number will be incremen
 
 ## Authentication
 
-All requests are expected to be made over an SSL connection and include an `Authentication` header that includes a token that can be used to authenticate the request. The format is:
+All requests are expected to be made over an SSL connection and include an `Authorization` header that includes a token that can be used to authenticate the request. The format is:
 
-        Authentication: Token 987ab987987c87d97e9877ff012
+        Authorization: Token 987ab987987c87d97e9877ff012
 
 # Group Operations