Issue #20326: Argument Clinic now uses a simple, unique signature to

annotate text signatures in docstrings, resulting in fewer false
positives.  "self" parameters are also explicitly marked, allowing
inspect.Signature() to authoritatively detect (and skip) said parameters.

Issue #20326: Argument Clinic now generates separate checksums for the
input and output sections of the block, allowing external tools to verify
that the input has not changed (and thus the output is not out-of-date).

Objects/unicodeobject.c

@@ -50,7 +50,7 @@ OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 /*[clinic input]
 class str "PyUnicodeObject *" "&PyUnicode_Type"
 [clinic start generated code]*/
-/*[clinic end generated code: checksum=da39a3ee5e6b4b0d3255bfef95601890afd80709]*/
+/*[clinic end generated code: output=da39a3ee5e6b4b0d input=604e916854800fa8]*/
 
 /* --- Globals ------------------------------------------------------------
 
@@ -12885,7 +12885,7 @@ must be a string, whose characters will be mapped to None in the result.
 [clinic start generated code]*/
 
 PyDoc_STRVAR(unicode_maketrans__doc__,
-"maketrans(x, y=None, z=None)\n"
+"sig=(x, y=None, z=None)\n"
 "Return a translation table usable for str.translate().\n"
 "\n"
 "If there is only one argument, it must be a dictionary mapping Unicode\n"
@@ -12922,7 +12922,7 @@ exit:
 
 static PyObject *
 unicode_maketrans_impl(PyObject *x, PyObject *y, PyObject *z)
-/*[clinic end generated code: checksum=90a3de8c494b304687e1e0d7e5fa8ba78eac6533]*/
+/*[clinic end generated code: output=ca001ac83ed32269 input=7bfbf529a293c6c5]*/
 {
     PyObject *new = NULL, *key, *value;
     Py_ssize_t i = 0;