Release v1.6.0 (#324)

* Update version and changelog for v1.6.0
* Update docs
diff --git a/docs/dyn/appengine_v1.apps.locations.html b/docs/dyn/appengine_v1.apps.locations.html
index 50a71c6..4189291 100644
--- a/docs/dyn/appengine_v1.apps.locations.html
+++ b/docs/dyn/appengine_v1.apps.locations.html
@@ -100,8 +100,8 @@
     "labels": { # Cross-service attributes for the location. For example {"cloud.googleapis.com/region": "us-east1"}
       "a_key": "A String",
     },
-    "locationId": "A String", # The canonical id for this location. For example: `"us-east1"`.
-    "name": "A String", # Resource name for the location, which may vary between implementations. For example: `"projects/example-project/locations/us-east1"`
+    "locationId": "A String", # The canonical id for this location. For example: "us-east1".
+    "name": "A String", # Resource name for the location, which may vary between implementations. For example: "projects/example-project/locations/us-east1"
     "metadata": { # Service-specific metadata. For example the available capacity at the given location.
       "a_key": "", # Properties of the object. Contains field @type with type URL.
     },
@@ -129,8 +129,8 @@
         "labels": { # Cross-service attributes for the location. For example {"cloud.googleapis.com/region": "us-east1"}
           "a_key": "A String",
         },
-        "locationId": "A String", # The canonical id for this location. For example: `"us-east1"`.
-        "name": "A String", # Resource name for the location, which may vary between implementations. For example: `"projects/example-project/locations/us-east1"`
+        "locationId": "A String", # The canonical id for this location. For example: "us-east1".
+        "name": "A String", # Resource name for the location, which may vary between implementations. For example: "projects/example-project/locations/us-east1"
         "metadata": { # Service-specific metadata. For example the available capacity at the given location.
           "a_key": "", # Properties of the object. Contains field @type with type URL.
         },