Disable doctest with deliberate SyntaxError

IPython/ipstruct.py

@@ -89,7 +89,7 b' class Struct:'
     accessed using the dictionary syntax. Again, an example:
 
     This doesn't work:
-    >>> s=Struct(4='hi')  #doctest: +IGNORE_EXCEPTION_DETAIL
+    >> s=Struct(4='hi')  #doctest: +IGNORE_EXCEPTION_DETAIL
     Traceback (most recent call last):
         ...
     SyntaxError: keyword can't be an expression