Update projects.md

The wrong example for "Branches".
Added option parameters in protect branch section.
Here is reason: https://gitlab.com/gitlab-org/gitlab-ee/commit/3ab07b8aae8dae43cfa3aae1306c59ea264a8594

Maybe this section could/should be deleted. Because in file repositories.md it had been deleted:  https://gitlab.com/gitlab-org/gitlab-ee/commit/8f3701eff005aeedcebff8ce02074f5056a369b3

doc/api/projects.md

@@ -998,6 +998,8 @@ is available before it is returned in the JSON response or an empty response is
 
 ## Branches
 
+For more information please consult the [Branches](branches.md) documentation.
+
 ### List branches
 
 Lists all branches of a project.
@@ -1016,56 +1018,46 @@ Parameters:
     "name": "async",
     "commit": {
       "id": "a2b702edecdf41f07b42653eb1abe30ce98b9fca",
-      "parents": [
-        {
-          "id": "3f94fc7c85061973edc9906ae170cc269b07ca55"
-        }
+      "parent_ids": [
+        "3f94fc7c85061973edc9906ae170cc269b07ca55"
       ],
-      "tree": "c68537c6534a02cc2b176ca1549f4ffa190b58ee",
       "message": "give Caolan credit where it's due (up top)",
-      "author": {
-        "name": "Jeremy Ashkenas",
-        "email": "jashkenas@example.com"
-      },
-      "committer": {
-        "name": "Jeremy Ashkenas",
-        "email": "jashkenas@example.com"
-      },
+      "author_name": "Jeremy Ashkenas",
+      "author_email": "jashkenas@example.com",
       "authored_date": "2010-12-08T21:28:50+00:00",
+      "committer_name": "Jeremy Ashkenas",
+      "committer_email": "jashkenas@example.com",
       "committed_date": "2010-12-08T21:28:50+00:00"
     },
-    "protected": false
+    "protected": false,
+    "developers_can_push": false,
+    "developers_can_merge": false
   },
   {
     "name": "gh-pages",
     "commit": {
       "id": "101c10a60019fe870d21868835f65c25d64968fc",
-      "parents": [
-        {
-          "id": "9c15d2e26945a665131af5d7b6d30a06ba338aaa"
-        }
+      "parent_ids": [
+          "9c15d2e26945a665131af5d7b6d30a06ba338aaa"
       ],
-      "tree": "fb5cc9d45da3014b17a876ad539976a0fb9b352a",
       "message": "Underscore.js 1.5.2",
-      "author": {
-        "name": "Jeremy Ashkenas",
-        "email": "jashkenas@example.com"
-      },
-      "committer": {
-        "name": "Jeremy Ashkenas",
-        "email": "jashkenas@example.com"
-      },
+      "author_name": "Jeremy Ashkenas",
+      "author_email": "jashkenas@example.com",
       "authored_date": "2013-09-07T12:58:21+00:00",
+      "committer_name": "Jeremy Ashkenas",
+      "committer_email": "jashkenas@example.com",
       "committed_date": "2013-09-07T12:58:21+00:00"
     },
-    "protected": false
+    "protected": false,
+    "developers_can_push": false,
+    "developers_can_merge": false
   }
 ]
 ```
 
-### List single branch
+### Single branch
 
-Lists a specific branch of a project.
+A specific branch of a project.
 
 ```
 GET /projects/:id/repository/branches/:branch
@@ -1075,6 +1067,8 @@ Parameters:
 
 - `id` (required) - The ID or NAMESPACE/PROJECT_NAME of a project
 - `branch` (required) - The name of the branch.
+- `developers_can_push` - Flag if developers can push to the branch.
+- `developers_can_merge` - Flag if developers can merge to the branch.
 
 ### Protect single branch