Fix the last known case of call signatures. Yay!

jedi/api/helpers.py

@@ -223,7 +223,7 @@ def _get_call_signature_details_from_error_node(node, position):
             # until the parentheses is enough.
             children = node.children[index:]
             name = element.get_previous_leaf()
-            if name.type == 'name' or name.parent.type == 'trailer':
+            if name.type == 'name' or name.parent.type in ('trailer', 'atom'):
                 return CallSignatureDetails(
                     element,
                     *_get_index_and_key(children, position)

jedi/evaluate/helpers.py

@@ -80,6 +80,8 @@ def call_of_name(name, cut_own_trailer=False):
 
     # TODO remove cut_own_trailer option, since its always used with it. Just
     #      ignore it, It's not what we want anyway. Or document it better?
+    # TODO rename this function, it's probably better called `call_of_leaf`,
+    #      since it can also be used for closing parentheses?!
     """
     trailer = name.parent
     if trailer.type != 'trailer':