Fix the previous error

jedi/api.py

@@ -391,7 +391,9 @@ class Script(object):
             defs, search_name = evaluate.goto(stmt)
             definitions = follow_inexistent_imports(defs)
             if isinstance(user_stmt, pr.Statement):
-                if user_stmt.get_commands()[0].start_pos > self.pos:
+                call = user_stmt.get_commands()[0]
+                if not isinstance(call, (str, unicode)) and \
+                   call.start_pos > self.pos:
                     # The cursor must be after the start, otherwise the
                     # statement is just an assignee.
                     definitions = [user_stmt]

jedi/evaluate.py

@@ -775,7 +775,10 @@ def goto(stmt, call_path=None):
         commands = stmt.get_commands()
         assert len(commands) == 1
         call = commands[0]
-        call_path = list(call.generate_call_path())
+        if isinstance(call, (str, unicode)):
+            call_path = [call]
+        else:
+            call_path = list(call.generate_call_path())
 
     scope = stmt.get_parent_until(pr.IsScope)
     pos = stmt.start_pos