gh-120526: Correct signature of map builtin

map requires at least one iterable arg. If you just do `map(map)`
you get an error "map() must have at least two arguments." This
corrects the signature to reflect this, in line with how it's
shown in https://docs.python.org/3/library/functions.html#map .

Signed-off-by: Adam Williamson <[email protected]>

Author: AdamWill

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\