Update URLs in comments and metadata to use HTTPS (GH-27458)

Doc/library/ast.rst

@@ -1795,7 +1795,7 @@ Function and class definitions
    * ``bases`` is a list of nodes for explicitly specified base classes.
    * ``keywords`` is a list of :class:`keyword` nodes, principally for 'metaclass'.
      Other keywords will be passed to the metaclass, as per `PEP-3115
-     <http://www.python.org/dev/peps/pep-3115/>`_.
+     <https://www.python.org/dev/peps/pep-3115/>`_.
    * ``starargs`` and ``kwargs`` are each a single node, as in a function call.
      starargs will be expanded to join the list of base classes, and kwargs will
      be passed to the metaclass.

Doc/library/contextlib.rst

@@ -171,7 +171,7 @@ Functions and classes provided:
       from contextlib import closing
       from urllib.request import urlopen
 
-      with closing(urlopen('http://www.python.org')) as page:
+      with closing(urlopen('https://www.python.org')) as page:
           for line in page:
               print(line)
 

Doc/library/functools.rst

@@ -202,7 +202,7 @@ The :mod:`functools` module defines the following functions:
         @lru_cache(maxsize=32)
         def get_pep(num):
             'Retrieve text of a Python Enhancement Proposal'
-            resource = 'http://www.python.org/dev/peps/pep-%04d/' % num
+            resource = 'https://www.python.org/dev/peps/pep-%04d/' % num
             try:
                 with urllib.request.urlopen(resource) as s:
                     return s.read()

Doc/library/re.rst

@@ -931,8 +931,8 @@ form.
    This is useful if you want to match an arbitrary literal string that may
    have regular expression metacharacters in it.  For example::
 
-      >>> print(re.escape('http://www.python.org'))
-      http://www\.python\.org
+      >>> print(re.escape('https://www.python.org'))
+      https://www\.python\.org
 
       >>> legal_chars = string.ascii_lowercase + string.digits + "!#$%&'*+-.^_`|~:"
       >>> print('[%s]+' % re.escape(legal_chars))

Doc/library/webbrowser.rst

@@ -39,7 +39,7 @@ parameters: ``-n`` opens the URL in a new browser window, if possible;
 ``-t`` opens the URL in a new browser page ("tab"). The options are,
 naturally, mutually exclusive.  Usage example::
 
-   python -m webbrowser -t "http://www.python.org"
+   python -m webbrowser -t "https://www.python.org"
 
 The following exception is defined:
 
@@ -176,7 +176,7 @@ Notes:
 
 Here are some simple examples::
 
-   url = 'http://docs.python.org/'
+   url = 'https://docs.python.org/'
 
    # Open URL in a new tab, if a browser window is already open.
    webbrowser.open_new_tab(url)