More docstring updates
diff --git a/Lib/_pyio.py b/Lib/_pyio.py
index 369bde9..d6dce6d 100644
--- a/Lib/_pyio.py
+++ b/Lib/_pyio.py
@@ -264,7 +264,8 @@
Even though IOBase does not declare read, readinto, or write because
their signatures will vary, implementations and clients should
consider those methods part of the interface. Also, implementations
- may raise a IOError when operations they do not support are called.
+ may raise UnsupportedOperation when operations they do not support are
+ called.
The basic type used for binary data read from or written to a file is
bytes. bytearrays are accepted too, and in some cases (such as
diff --git a/Modules/_io/iobase.c b/Modules/_io/iobase.c
index 6521ae2..c74672d 100644
--- a/Modules/_io/iobase.c
+++ b/Modules/_io/iobase.c
@@ -35,7 +35,8 @@
"Even though IOBase does not declare read, readinto, or write because\n"
"their signatures will vary, implementations and clients should\n"
"consider those methods part of the interface. Also, implementations\n"
- "may raise a IOError when operations they do not support are called.\n"
+ "may raise UnsupportedOperation when operations they do not support are\n"
+ "called.\n"
"\n"
"The basic type used for binary data read from or written to a file is\n"
"bytes. bytearrays are accepted too, and in some cases (such as\n"
@@ -300,7 +301,7 @@
PyDoc_STRVAR(iobase_seekable_doc,
"Return whether object supports random access.\n"
"\n"
- "If False, seek(), tell() and truncate() will raise IOError.\n"
+ "If False, seek(), tell() and truncate() will raise UnsupportedOperation.\n"
"This method may need to do a test seek().");
static PyObject *
@@ -329,7 +330,7 @@
PyDoc_STRVAR(iobase_readable_doc,
"Return whether object was opened for reading.\n"
"\n"
- "If False, read() will raise IOError.");
+ "If False, read() will raise UnsupportedOperation.");
static PyObject *
iobase_readable(PyObject *self, PyObject *args)
@@ -358,7 +359,7 @@
PyDoc_STRVAR(iobase_writable_doc,
"Return whether object was opened for writing.\n"
"\n"
- "If False, read() will raise IOError.");
+ "If False, write() will raise UnsupportedOperation.");
static PyObject *
iobase_writable(PyObject *self, PyObject *args)