[3.13] gh-120526: Correct signature of map() builtin (GH-120528) (GH-120539)

map() requires at least one iterable arg.

(cherry picked from commit d4039d3)

Signed-off-by: Adam Williamson <awilliam@redhat.com>
Co-authored-by: Adam Williamson <adam@blueradius.ca>

Author: miss-islington

Python/bltinmodule.c

@@ -1475,7 +1475,7 @@ static PyMethodDef map_methods[] = {
 
 
 PyDoc_STRVAR(map_doc,
-"map(function, /, *iterables)\n\
+"map(function, iterable, /, *iterables)\n\
 --\n\
 \n\
 Make an iterator that computes the function using arguments from\n\