Apply rstrip() to the lines read from _dirfile in _update(), so that a

dumbdbm archive created on Windows can be read on Unix.

Lib/dumbdbm.py

@@ -52,7 +52,7 @@ class _Database:
 			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)