address review: add fake signature for Struct

Author: skirpichev

Lib/test/test_inspect/test_inspect.py

@@ -6295,8 +6295,7 @@ def test_stat_module_has_signatures(self):
 
     def test_struct_module_has_signatures(self):
         import struct
-        unsupported_signature = {'Struct'}
-        self._test_module_has_signatures(struct, unsupported_signature=unsupported_signature)
+        self._test_module_has_signatures(struct)
 
     def test_string_module_has_signatures(self):
         import string

Modules/_struct.c

@@ -1825,6 +1825,7 @@ s_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
 }
 
 /*[clinic input]
+@text_signature "(format)"
 Struct.__init__
 
     format: object = NULL
@@ -1837,7 +1838,7 @@ to the format string.  See help(struct) for more on format strings.
 
 static int
 Struct___init___impl(PyStructObject *self, PyObject *format)
-/*[clinic end generated code: output=b8e80862444e92d0 input=6275ff3f85752dd7]*/
+/*[clinic end generated code: output=b8e80862444e92d0 input=dcf0b5a00eb0dbd9]*/
 {
     if (!format && !self->s_codes) {
         PyErr_SetString(PyExc_TypeError,