Fix Common Typo's.

Fix instances of:
* Retreive
* Recieve
* other then
* different then
* Repeated words ("the the", "an an", "and and", etc).
* othterwise, teh

ASTERISK-24198 #close

Change-Id: I3809a9c113b92fd9d0d9f9bac98e9c66dc8b2d31

res/res_pjsip_pubsub.c

@@ -895,7 +895,7 @@ static int have_visited(const char *resource, struct resources *visited)
  * This iterates through the items on a resource list and creates tree nodes for each one. The
  * tree nodes created are children of the supplied parent node. If an item in the resource
  * list is itself a list, then this function is called recursively to provide children for
- * the the new node.
+ * the new node.
  *
  * If an item in a resource list is not a list, then the supplied subscription handler is
  * called into as if a new SUBSCRIBE for the list item were presented. The handler's response