Update docs

docs/api-guide/exceptions.md

@@ -51,10 +51,10 @@ In order to alter the style of the response, you could write the following custo
 
     from rest_framework.views import exception_handler
 
-    def custom_exception_handler(exc):
+    def custom_exception_handler(exc, context):
         # Call REST framework's default exception handler first,
         # to get the standard error response.
-        response = exception_handler(exc)
+        response = exception_handler(exc, context)
 
         # Now add the HTTP status code to the response.
         if response is not None:

docs/api-guide/settings.md

@@ -393,7 +393,7 @@ This setting can be changed to support error responses other than the default `{
 
 This should be a function with the following signature:
 
-    exception_handler(exc)
+    exception_handler(exc, context)
 
 * `exc`: The exception.