Fixed typo.
diff --git a/Doc/library/io.rst b/Doc/library/io.rst
index 49faee2..204b204 100644
--- a/Doc/library/io.rst
+++ b/Doc/library/io.rst
@@ -633,7 +633,7 @@
.. class:: StringIO([initial_value[, encoding[, errors[, newline]]]])
- An in-memory stream for text. It in inherits :class:`TextIOWrapper`.
+ An in-memory stream for text. It inherits :class:`TextIOWrapper`.
Create a new StringIO stream with an inital value, encoding, error handling,
and newline setting. See :class:`TextIOWrapper`\'s constructor for more