Issue #24001: Argument Clinic converters now use accept={type}
instead of types={'type'} to specify the types the converter accepts.
diff --git a/Modules/_io/_iomodule.c b/Modules/_io/_iomodule.c
index ea727f2..528bcd4 100644
--- a/Modules/_io/_iomodule.c
+++ b/Modules/_io/_iomodule.c
@@ -100,9 +100,9 @@
     file: object
     mode: str = "r"
     buffering: int = -1
-    encoding: str(nullable=True) = NULL
-    errors: str(nullable=True) = NULL
-    newline: str(nullable=True) = NULL
+    encoding: str(accept={str, NoneType}) = NULL
+    errors: str(accept={str, NoneType}) = NULL
+    newline: str(accept={str, NoneType}) = NULL
     closefd: int(c_default="1") = True
     opener: object = None
 
@@ -230,7 +230,7 @@
 _io_open_impl(PyModuleDef *module, PyObject *file, const char *mode,
               int buffering, const char *encoding, const char *errors,
               const char *newline, int closefd, PyObject *opener)
-/*[clinic end generated code: output=7615d0d746eb14d2 input=0541ce15691a82f2]*/
+/*[clinic end generated code: output=7615d0d746eb14d2 input=f4e1ca75223987bc]*/
 {
     unsigned i;
 
diff --git a/Modules/_io/bufferedio.c b/Modules/_io/bufferedio.c
index 916353b..2c90648 100644
--- a/Modules/_io/bufferedio.c
+++ b/Modules/_io/bufferedio.c
@@ -101,26 +101,26 @@
 
 /*[clinic input]
 _io._BufferedIOBase.readinto
-    buffer: Py_buffer(types={'rwbuffer'})
+    buffer: Py_buffer(accept={rwbuffer})
     /
 [clinic start generated code]*/
 
 static PyObject *
 _io__BufferedIOBase_readinto_impl(PyObject *self, Py_buffer *buffer)
-/*[clinic end generated code: output=8c8cda6684af8038 input=f8242a06c21763a0]*/
+/*[clinic end generated code: output=8c8cda6684af8038 input=00a6b9a38f29830a]*/
 {
     return _bufferediobase_readinto_generic(self, buffer, 0);
 }
 
 /*[clinic input]
 _io._BufferedIOBase.readinto1
-    buffer: Py_buffer(types={'rwbuffer'})
+    buffer: Py_buffer(accept={rwbuffer})
     /
 [clinic start generated code]*/
 
 static PyObject *
 _io__BufferedIOBase_readinto1_impl(PyObject *self, Py_buffer *buffer)
-/*[clinic end generated code: output=358623e4fd2b69d3 input=2003e706c730bd21]*/
+/*[clinic end generated code: output=358623e4fd2b69d3 input=ebad75b4aadfb9be]*/
 {
     return _bufferediobase_readinto_generic(self, buffer, 1);
 }
@@ -1065,26 +1065,26 @@
 
 /*[clinic input]
 _io._Buffered.readinto
-    buffer: Py_buffer(types={'rwbuffer'})
+    buffer: Py_buffer(accept={rwbuffer})
     /
 [clinic start generated code]*/
 
 static PyObject *
 _io__Buffered_readinto_impl(buffered *self, Py_buffer *buffer)
-/*[clinic end generated code: output=bcb376580b1d8170 input=962b7496eac38b3a]*/
+/*[clinic end generated code: output=bcb376580b1d8170 input=ed6b98b7a20a3008]*/
 {
     return _buffered_readinto_generic(self, buffer, 0);
 }
 
 /*[clinic input]
 _io._Buffered.readinto1
-    buffer: Py_buffer(types={'rwbuffer'})
+    buffer: Py_buffer(accept={rwbuffer})
     /
 [clinic start generated code]*/
 
 static PyObject *
 _io__Buffered_readinto1_impl(buffered *self, Py_buffer *buffer)
-/*[clinic end generated code: output=6e5c6ac5868205d6 input=834614d93f0adeb5]*/
+/*[clinic end generated code: output=6e5c6ac5868205d6 input=4455c5d55fdf1687]*/
 {
     return _buffered_readinto_generic(self, buffer, 1);
 }
diff --git a/Modules/_io/bytesio.c b/Modules/_io/bytesio.c
index 42dfe24..d46430d 100644
--- a/Modules/_io/bytesio.c
+++ b/Modules/_io/bytesio.c
@@ -541,7 +541,7 @@
 
 /*[clinic input]
 _io.BytesIO.readinto
-    buffer: Py_buffer(types={'rwbuffer'})
+    buffer: Py_buffer(accept={rwbuffer})
     /
 
 Read up to len(buffer) bytes into buffer.
@@ -552,7 +552,7 @@
 
 static PyObject *
 _io_BytesIO_readinto_impl(bytesio *self, Py_buffer *buffer)
-/*[clinic end generated code: output=a5d407217dcf0639 input=d289da851c7c4159]*/
+/*[clinic end generated code: output=a5d407217dcf0639 input=71581f32635c3a31]*/
 {
     Py_ssize_t len, n;
 
diff --git a/Modules/_io/fileio.c b/Modules/_io/fileio.c
index 0894ca4..12e37bb 100644
--- a/Modules/_io/fileio.c
+++ b/Modules/_io/fileio.c
@@ -603,7 +603,7 @@
 
 /*[clinic input]
 _io.FileIO.readinto
-    buffer: Py_buffer(types={'rwbuffer'})
+    buffer: Py_buffer(accept={rwbuffer})
     /
 
 Same as RawIOBase.readinto().
@@ -611,7 +611,7 @@
 
 static PyObject *
 _io_FileIO_readinto_impl(fileio *self, Py_buffer *buffer)
-/*[clinic end generated code: output=b01a5a22c8415cb4 input=5edd8327498d468c]*/
+/*[clinic end generated code: output=b01a5a22c8415cb4 input=4721d7b68b154eaf]*/
 {
     Py_ssize_t n;
     int err;
diff --git a/Modules/_io/textio.c b/Modules/_io/textio.c
index f61b281..c45f70d 100644
--- a/Modules/_io/textio.c
+++ b/Modules/_io/textio.c
@@ -789,9 +789,9 @@
 /*[clinic input]
 _io.TextIOWrapper.__init__
     buffer: object
-    encoding: str(nullable=True) = NULL
-    errors: str(nullable=True) = NULL
-    newline: str(nullable=True) = NULL
+    encoding: str(accept={str, NoneType}) = NULL
+    errors: str(accept={str, NoneType}) = NULL
+    newline: str(accept={str, NoneType}) = NULL
     line_buffering: int(c_default="0") = False
     write_through: int(c_default="0") = False
 
@@ -830,7 +830,7 @@
                                 const char *encoding, const char *errors,
                                 const char *newline, int line_buffering,
                                 int write_through)
-/*[clinic end generated code: output=56a83402ce2a8381 input=1f20decb8d54a4ec]*/
+/*[clinic end generated code: output=56a83402ce2a8381 input=3126cb3101a2c99b]*/
 {
     PyObject *raw, *codec_info = NULL;
     _PyIO_State *state = NULL;