#21225: copy docstrings from base classes

diff --git a/Lib/io.py b/Lib/io.py
index 22832766c4cc91f06bf39080f3a3b1836e81622b..14384930c5ce3cd1753ce5f255bdafeecc39a4d2 100644 (file)
--- a/Lib/io.py
+++ b/Lib/io.py
@@ -68,15 +68,16 @@ SEEK_END = 2
 # version however.
 class IOBase(_io._IOBase):
     __metaclass__ = abc.ABCMeta
+    __doc__ = _io._IOBase.__doc__
 
 class RawIOBase(_io._RawIOBase, IOBase):
-    pass
+    __doc__ = _io._RawIOBase.__doc__
 
 class BufferedIOBase(_io._BufferedIOBase, IOBase):
-    pass
+    __doc__ = _io._BufferedIOBase.__doc__
 
 class TextIOBase(_io._TextIOBase, IOBase):
-    pass
+    __doc__ = _io._TextIOBase.__doc__
 
 RawIOBase.register(FileIO)