Fix 406 Client Error: Not Acceptable errors in test suite because new kind of Fastly filtering/blocking

src/crate/client/doctests/http.txt

@@ -181,13 +181,13 @@ an exception is raised when the timeout is reached::
     ...
     crate.client.exceptions.ConnectionError: No more Servers available, exception from last server: ...
 
-When connecting to non Crate servers the HttpClient will raise a ConnectionError like this::
+When connecting to non-CrateDB servers, the HttpClient will raise a ConnectionError like this::
 
-    >>> http_client = HttpClient(["https://crate.io"])
+    >>> http_client = HttpClient(["https://httpbin.org/html"])
     >>> http_client.server_infos(http_client._get_server())
     Traceback (most recent call last):
     ...
-    crate.client.exceptions.ProgrammingError: Invalid server response of content-type 'text/html; charset=UTF-8':
+    crate.client.exceptions.ProgrammingError: Invalid server response of content-type 'text/html; charset=utf-8':
     ...
 
 When using the ``error_trace`` kwarg a full traceback of the server exception

src/crate/client/doctests/mocking.txt

@@ -5,7 +5,7 @@ Client Mocking
 For testing purposes it is often useful to replace the client used for
 communication with the CrateDB server with a stub or mock.
 
-This can be done by passing a object of the Client class when calling the
+This can be done by passing an object of the Client class when calling the
 ``connect`` method::
 
     >>> from crate import client