Use shortcut "directive" for subset note

Author: tekktrik

shared-bindings/random/__init__.c

@@ -35,20 +35,14 @@
 
 //| """pseudo-random numbers and choices
 //|
-//| The `random` module is a strict subset of the CPython `cpython:random`
-//| module. So, code written in CircuitPython will work in CPython but not
-//| necessarily the other way around.
+//| |see_cpython_module| :mod:`cpython:random`.
 //|
 //| Like its CPython cousin, CircuitPython's random seeds itself on first use
 //| with a true random from os.urandom() when available or the uptime otherwise.
 //| Once seeded, it will be deterministic, which is why its bad for cryptography.
 //|
 //| .. warning:: Numbers from this module are not cryptographically strong! Use
-//|   bytes from `os.urandom` directly for true randomness.
-//|
-//| For more information about the `random` module, see the CPython documentation:
-//| https://docs.python.org/3/library/random.html
-//| """
+//|   bytes from `os.urandom` directly for true randomness."""
 //|
 //| from typing import TypeVar
 //| _T = TypeVar('_T')

shared-bindings/ssl/__init__.c

@@ -34,12 +34,7 @@
 //| """
 //| The `ssl` module provides SSL contexts to wrap sockets in.
 //|
-//| This module is a strict subset of the CPython `ssl` module.
-//| So, code written in CircuitPython will work in CPython but not
-//| necessarily the other way around.
-//|
-//| For more information about the `ssl` module see the CPython documentation
-//| https://docs.python.org/3/library/ssl.html
+//| |see_cpython_module| :mod:`cpython:ssl`.
 //| """
 //|
 

shared-bindings/time/__init__.c

@@ -38,12 +38,7 @@
 
 //| """time and timing related functions
 //|
-//| The `time` module is a strict subset of the CPython `cpython:time` module. So, code
-//| using `time` written in CircuitPython will work in CPython but not necessarily the other
-//| way around.
-//|
-//| For more information about the `time` module, see the CPython documentation:
-//| https://docs.python.org/3/library/time.html
+//| |see_cpython_module| :mod:`cpython:time`.
 //| """
 //|
 //| def monotonic() -> float: