bpo-31446: Copy command line that should be passed to CreateProcessW(). (GH-11141)

diff --git a/Modules/clinic/_winapi.c.h b/Modules/clinic/_winapi.c.h
index f82b46d..241c18e 100644
--- a/Modules/clinic/_winapi.c.h
+++ b/Modules/clinic/_winapi.c.h
@@ -286,6 +286,8 @@
 "\n"
 "Create a new process and its primary thread.\n"
 "\n"
+"  command_line\n"
+"    Can be str or None\n"
 "  proc_attrs\n"
 "    Ignored internally, can be None.\n"
 "  thread_attrs\n"
@@ -299,7 +301,7 @@
 
 static PyObject *
 _winapi_CreateProcess_impl(PyObject *module, Py_UNICODE *application_name,
-                           Py_UNICODE *command_line, PyObject *proc_attrs,
+                           PyObject *command_line, PyObject *proc_attrs,
                            PyObject *thread_attrs, BOOL inherit_handles,
                            DWORD creation_flags, PyObject *env_mapping,
                            Py_UNICODE *current_directory,
@@ -310,7 +312,7 @@
 {
     PyObject *return_value = NULL;
     Py_UNICODE *application_name;
-    Py_UNICODE *command_line;
+    PyObject *command_line;
     PyObject *proc_attrs;
     PyObject *thread_attrs;
     BOOL inherit_handles;
@@ -319,7 +321,7 @@
     Py_UNICODE *current_directory;
     PyObject *startup_info;
 
-    if (!_PyArg_ParseStack(args, nargs, "ZZOOikOZO:CreateProcess",
+    if (!_PyArg_ParseStack(args, nargs, "ZOOOikOZO:CreateProcess",
         &application_name, &command_line, &proc_attrs, &thread_attrs, &inherit_handles, &creation_flags, &env_mapping, &current_directory, &startup_info)) {
         goto exit;
     }
@@ -941,4 +943,4 @@
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=915dd640329de0c0 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=1568ad4bd625f2af input=a9049054013a1b77]*/