fix: correct docstrings in prime_numbers.py

The docstrings for slow_primes(), primes(), and fast_primes()
incorrectly stated 'Return a list of all primes numbers up to max.'
However, all three functions return a Generator[int], not a list.
Also fixed the grammar: 'primes numbers' -> 'prime numbers'.

Author: 23f2000188

maths/prime_numbers.py

@@ -4,7 +4,7 @@
 
 def slow_primes(max_n: int) -> Generator[int]:
     """
-    Return a list of all primes numbers up to max.
+    Return a generator of all prime numbers up to max_n.
     >>> list(slow_primes(0))
     []
     >>> list(slow_primes(-1))
@@ -31,7 +31,7 @@ def slow_primes(max_n: int) -> Generator[int]:
 
 def primes(max_n: int) -> Generator[int]:
     """
-    Return a list of all primes numbers up to max.
+    Return a generator of all prime numbers up to max_n.
     >>> list(primes(0))
     []
     >>> list(primes(-1))
@@ -60,7 +60,7 @@ def primes(max_n: int) -> Generator[int]:
 
 def fast_primes(max_n: int) -> Generator[int]:
     """
-    Return a list of all primes numbers up to max.
+    Return a generator of all prime numbers up to max_n.
     >>> list(fast_primes(0))
     []
     >>> list(fast_primes(-1))