Fix crash for non breaking spaces in docstring

tests/data/comments_non_breaking_space.py

@@ -2,18 +2,19 @@
     # DEFAULT_TYPE_ATTRIBUTES,
 )
 
-result = 1  # A simple comment
-result = (    1, ) # Another one
+result = 1  # A simple comment with a NBSP
+result = (    1, ) # Another NBSP
 
 result = 1    # type: ignore
-result = 1# This comment is talking about type: ignore
+result = 1# This comment is talking about type: ignore and start with NBSP
 square = Square(4) # type: Optional[Square]
 
 def function(a:int=42):
-    """ This docstring is already formatted
-       a
-       b
+    """ This docstring start with a NBSP
+        There is one NBSP column 5 here
+       This is 7 NBSP
     """
+
     #    There's a NBSP + 3 spaces before
     #    And 4 spaces on the next line
     pass