gh-151945: Address review — sentence-case headers, plain language, markup

Apply Hugo's review feedback for Doc/library/http.cookiejar.rst:

- Use sentence case for the four "... Objects" section headers.
- Replace the Latin abbreviations "ie."/"eg." with "that is"/"for
  example" per the devguide simple-language guidance.
- Use ``None`` literal markup instead of :const:`None`.
- Reference the removed method as :meth:`!get_origin_req_host` to match
  the surrounding formatting.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: harjothkhara

Doc/library/http.cookiejar.rst

@@ -26,7 +26,7 @@ introduced with RFC 2965.
 .. note::
 
    The various named parameters found in :mailheader:`Set-Cookie` and
-   :mailheader:`Set-Cookie2` headers (eg. ``domain`` and ``expires``) are
+   :mailheader:`Set-Cookie2` headers (for example, ``domain`` and ``expires``) are
    conventionally referred to as :dfn:`attributes`.  To distinguish them from
    Python attributes, the documentation for this module uses the term
    :dfn:`cookie-attribute` instead.
@@ -85,15 +85,15 @@ The following classes are provided:
 
    Constructor arguments should be passed as keyword arguments only.
    *blocked_domains* is a sequence of domain names that we never accept cookies
-   from, nor return cookies to. *allowed_domains* if not :const:`None`, this is a
+   from, nor return cookies to. *allowed_domains* if not ``None``, this is a
    sequence of the only domains for which we accept and return cookies.
    *secure_protocols* is a sequence of protocols for which secure cookies can be
    added to. By default *https* and *wss* (secure websocket) are considered
    secure protocols. For all other arguments, see the documentation for
    :class:`CookiePolicy` and :class:`DefaultCookiePolicy` objects.
 
    :class:`DefaultCookiePolicy` implements the standard accept / reject rules for
-   Netscape and :rfc:`2965` cookies.  By default, :rfc:`2109` cookies (ie. cookies
+   Netscape and :rfc:`2965` cookies.  By default, :rfc:`2109` cookies (that is, cookies
    received in a :mailheader:`Set-Cookie` header with a version cookie-attribute of
    1) are treated according to the RFC 2965 rules.  However, if RFC 2965 handling
    is turned off or :attr:`rfc2109_as_netscape` is ``True``, RFC 2109 cookies are
@@ -141,7 +141,7 @@ The following classes are provided:
 
 .. _cookie-jar-objects:
 
-CookieJar and FileCookieJar Objects
+CookieJar and FileCookieJar objects
 -----------------------------------
 
 :class:`CookieJar` objects support the :term:`iterator` protocol for iterating over
@@ -154,7 +154,7 @@ contained :class:`Cookie` objects.
 
    Add correct :mailheader:`Cookie` header to *request*.
 
-   If policy allows (ie. the :attr:`~CookiePolicy.rfc2965` and
+   If policy allows (that is, the :attr:`~CookiePolicy.rfc2965` and
    :attr:`~CookiePolicy.hide_cookie2` attributes of
    the :class:`CookieJar`'s :class:`CookiePolicy` instance are true and false
    respectively), the :mailheader:`Cookie2` header is also added when appropriate.
@@ -173,8 +173,8 @@ contained :class:`Cookie` objects.
    .. versionchanged:: 3.3
 
     *request* object needs :attr:`~urllib.request.Request.origin_req_host`
-    attribute. Dependency on a deprecated method ``get_origin_req_host`` has
-    been removed.
+    attribute. Dependency on a deprecated method
+    :meth:`!get_origin_req_host` has been removed.
 
 
 .. method:: CookieJar.extract_cookies(response, request)
@@ -203,8 +203,8 @@ contained :class:`Cookie` objects.
    .. versionchanged:: 3.3
 
     *request* object needs :attr:`~urllib.request.Request.origin_req_host`
-    attribute. Dependency on a deprecated method ``get_origin_req_host`` has
-    been removed.
+    attribute. Dependency on a deprecated method
+    :meth:`!get_origin_req_host` has been removed.
 
 .. method:: CookieJar.set_policy(policy)
 
@@ -268,7 +268,7 @@ contained :class:`Cookie` objects.
    *filename* is the name of file in which to save cookies.  If *filename* is not
    specified, :attr:`~FileCookieJar.filename` is used (whose default is the
    value passed to the constructor, if any); if
-   :attr:`~FileCookieJar.filename` is :const:`None`,
+   :attr:`~FileCookieJar.filename` is ``None``,
    :exc:`ValueError` is raised.
 
    *ignore_discard*: save even cookies set to be discarded. *ignore_expires*: save
@@ -361,7 +361,7 @@ writing.
 
 .. _cookie-policy-objects:
 
-CookiePolicy Objects
+CookiePolicy objects
 --------------------
 
 Objects implementing the :class:`CookiePolicy` interface have the following
@@ -445,7 +445,7 @@ setting and receiving any and all cookies (this is unlikely to be useful).
 
 .. _default-cookie-policy-objects:
 
-DefaultCookiePolicy Objects
+DefaultCookiePolicy objects
 ---------------------------
 
 Implements the standard rules for accepting and returning cookies.
@@ -478,8 +478,7 @@ participate in cookie setting and returning.  Use the *blocked_domains*
 constructor argument, and :meth:`~DefaultCookiePolicy.blocked_domains` and
 :meth:`~DefaultCookiePolicy.set_blocked_domains` methods (and the corresponding
 argument and methods for *allowed_domains*).  If you set an allowlist, you can
-turn it off again by
-setting it to :const:`None`.
+turn it off again by setting it to ``None``.
 
 Domains in block or allow lists that do not start with a dot must equal the
 cookie domain to be matched.  For example, ``"example.com"`` matches a blocklist
@@ -511,12 +510,12 @@ and ``".168.1.2"``, 192.168.1.2 is blocked, but 193.168.1.2 is not.
 
 .. method:: DefaultCookiePolicy.allowed_domains()
 
-   Return :const:`None`, or the sequence of allowed domains (as a tuple).
+   Return ``None``, or the sequence of allowed domains (as a tuple).
 
 
 .. method:: DefaultCookiePolicy.set_allowed_domains(allowed_domains)
 
-   Set the sequence of allowed domains, or :const:`None`.
+   Set the sequence of allowed domains, or ``None``.
 
 
 .. method:: DefaultCookiePolicy.is_not_allowed(domain)
@@ -532,9 +531,9 @@ all be assigned to.
 .. attribute:: DefaultCookiePolicy.rfc2109_as_netscape
 
    If true, request that the :class:`CookieJar` instance downgrade :rfc:`2109` cookies
-   (ie. cookies received in a :mailheader:`Set-Cookie` header with a version
+   (that is, cookies received in a :mailheader:`Set-Cookie` header with a version
    cookie-attribute of 1) to Netscape cookies by setting the version attribute of
-   the :class:`Cookie` instance to 0.  The default value is :const:`None`, in which
+   the :class:`Cookie` instance to 0.  The default value is ``None``, in which
    case RFC 2109 cookies are downgraded if and only if :rfc:`2965` handling is turned
    off.  Therefore, RFC 2109 cookies are downgraded by default.
 
@@ -587,15 +586,15 @@ both flags are set).
 
 .. attribute:: DefaultCookiePolicy.DomainStrictNoDots
 
-   When setting cookies, the 'host prefix' must not contain a dot (eg.
+   When setting cookies, the 'host prefix' must not contain a dot (for example,
    ``www.foo.bar.com`` can't set a cookie for ``.bar.com``, because ``www.foo``
    contains a dot).
 
 
 .. attribute:: DefaultCookiePolicy.DomainStrictNonDomain
 
    Cookies that did not explicitly specify a ``domain`` cookie-attribute can only
-   be returned to a domain equal to the domain that set the cookie (eg.
+   be returned to a domain equal to the domain that set the cookie (for example,
    ``spam.example.com`` won't be returned cookies from ``example.com`` that had no
    ``domain`` cookie-attribute).
 
@@ -610,7 +609,7 @@ combinations of the above flags:
 
 .. attribute:: DefaultCookiePolicy.DomainLiberal
 
-   Equivalent to 0 (ie. all of the above Netscape domain strictness flags switched
+   Equivalent to 0 (that is, all of the above Netscape domain strictness flags switched
    off).
 
 
@@ -619,7 +618,7 @@ combinations of the above flags:
    Equivalent to ``DomainStrictNoDots|DomainStrictNonDomain``.
 
 
-Cookie Objects
+Cookie objects
 --------------
 
 :class:`Cookie` instances have Python attributes roughly corresponding to the
@@ -637,7 +636,7 @@ internal consistency, so you should know what you're doing if you do that.
 
 .. attribute:: Cookie.version
 
-   Integer or :const:`None`.  Netscape cookies have :attr:`version` 0. :rfc:`2965` and
+   Integer or ``None``.  Netscape cookies have :attr:`version` 0. :rfc:`2965` and
    :rfc:`2109` cookies have a ``version`` cookie-attribute of 1.  However, note that
    :mod:`!http.cookiejar` may 'downgrade' RFC 2109 cookies to Netscape cookies, in which
    case :attr:`version` is 0.
@@ -650,13 +649,13 @@ internal consistency, so you should know what you're doing if you do that.
 
 .. attribute:: Cookie.value
 
-   Cookie value (a string), or :const:`None`.
+   Cookie value (a string), or ``None``.
 
 
 .. attribute:: Cookie.port
 
-   String representing a port or a set of ports (eg. '80', or '80,8080'), or
-   :const:`None`.
+   String representing a port or a set of ports (for example, '80', or '80,8080'), or
+   ``None``.
 
 
 .. attribute:: Cookie.domain
@@ -666,7 +665,7 @@ internal consistency, so you should know what you're doing if you do that.
 
 .. attribute:: Cookie.path
 
-   Cookie path (a string, eg. ``'/acme/rocket_launchers'``).
+   Cookie path (a string, for example, ``'/acme/rocket_launchers'``).
 
 
 .. attribute:: Cookie.secure
@@ -676,7 +675,7 @@ internal consistency, so you should know what you're doing if you do that.
 
 .. attribute:: Cookie.expires
 
-   Integer expiry date in seconds since epoch, or :const:`None`.  See also the
+   Integer expiry date in seconds since epoch, or ``None``.  See also the
    :meth:`is_expired` method.
 
 
@@ -688,18 +687,18 @@ internal consistency, so you should know what you're doing if you do that.
 .. attribute:: Cookie.comment
 
    String comment from the server explaining the function of this cookie, or
-   :const:`None`.
+   ``None``.
 
 
 .. attribute:: Cookie.comment_url
 
    URL linking to a comment from the server explaining the function of this cookie,
-   or :const:`None`.
+   or ``None``.
 
 
 .. attribute:: Cookie.rfc2109
 
-   ``True`` if this cookie was received as an :rfc:`2109` cookie (ie. the cookie
+   ``True`` if this cookie was received as an :rfc:`2109` cookie (that is, the cookie
    arrived in a :mailheader:`Set-Cookie` header, and the value of the Version
    cookie-attribute in that header was 1).  This attribute is provided because
    :mod:`!http.cookiejar` may 'downgrade' RFC 2109 cookies to Netscape cookies, in