Make end_pos public for syntax issues

parso/normalizer.py

@@ -119,7 +119,6 @@ class NormalizerConfig(object):
 
 class Issue(object):
     def __init__(self, node, code, message):
-        self._node = node
         self.code = code
         """
         An integer code that stands for the type of error.
@@ -133,6 +132,7 @@ class Issue(object):
         The start position position of the error as a tuple (line, column). As
         always in |parso| the first line is 1 and the first column 0.
         """
+        self.end_pos = node.end_pos
 
     def __eq__(self, other):
         return self.start_pos == other.start_pos and self.code == other.code