add ATEQUAL token for python < 3.5

jedi/parser/token.py

@@ -1,6 +1,6 @@
 from __future__ import absolute_import
 
-from jedi._compatibility import is_py3
+from jedi._compatibility import is_py3, is_py35
 from token import *
 
 
@@ -24,6 +24,11 @@ else:
     tok_name[ELLIPSIS] = 'ELLIPSIS'
     N_TOKENS += 1
 
+if not is_py35:
+    ATEQUAL = N_TOKENS
+    tok_name[ATEQUAL] = 'ATEQUAL'
+    N_TOKENS += 1
+
 
 
 # Map from operator to number (since tokenize doesn't do this)