Swap the check for Jedi versions around

IPython/core/completer.py

@@ -1351,11 +1351,11 b' class IPCompleter(Completer):'
         try:
             # should we check the type of the node is Error ?
             try:
-                # jedi >= 0.11
-                from parso.tree import ErrorLeaf
-            except ImportError:
                 # jedi < 0.11
                 from jedi.parser.tree import ErrorLeaf
+            except ImportError:
+                # jedi >= 0.11
+                from parso.tree import ErrorLeaf
 
             next_to_last_tree = interpreter._get_module().tree_node.children[-2]
             completing_string = False