gh-119793: Add optional length-checking to map()

[nineteendo]

These two examples silently truncate the unmatched inputs:

>>>list(map(pow, [1, 2, 3], [2, 2, 2, 2]))
[1, 4, 9]
>>>list(map(pow, [1, 2, 3, 4, 5], [2, 2, 2, 2]))
[1, 4, 9, 16]

• Issue: Add a "strict" option for map() #119793

---

📚 Documentation preview 📚: library/functions.html#map

[nineteendo]

@rhettinger, thoughts? You requested this. Or do you want someone else to review it?

[nineteendo]

Thanks Petr, do you know someone besides Brandt and Reymond that might want to review this? I think it would be best to have more than 1 approval.

[encukou]

It would, but if no one finds the time, I plan to merge it next week.

[nineteendo]

Erlend, your remaining suggestions also apply to zip(), as the code was copied. What do you suggest I do?