Update errno tests to match new expected behavior

Signed-off-by: Matt Wozniski <mwozniski@bloomberg.net>

tests/basics/errno1.py

@@ -11,7 +11,10 @@ print(type(uerrno.EIO))
 
 # check that errors are rendered in a nice way
 msg = str(OSError(uerrno.EIO))
-print(msg[:7], msg[-5:])
+print(msg[:7], msg[msg.find(']'):])
+
+msg = str(OSError(uerrno.ENOBUFS))
+print(msg[:7], msg[msg.find(']'):])
 
 # check that unknown errno is still rendered
 print(str(OSError(9999)))

tests/basics/errno1.py.exp

@@ -1,3 +1,4 @@
 <class 'int'>
-[Errno  ] EIO
+[Errno  ] Input/output error
+[Errno  ] ENOBUFS
 9999