Apply rstrip() to the lines read from _dirfile in _update(), so that a
dumbdbm archive created on Windows can be read on Unix.
diff --git a/Lib/dumbdbm.py b/Lib/dumbdbm.py
index 0ce901f..9ed05d6 100644
--- a/Lib/dumbdbm.py
+++ b/Lib/dumbdbm.py
@@ -52,7 +52,7 @@
 			pass
 		else:
 			while 1:
-				line = f.readline()
+				line = f.readline().rstrip()
 				if not line: break
 				key, (pos, siz) = eval(line)
 				self._index[key] = (pos, siz)