Merge doc touchups from 3.1

Doc/library/http.cookiejar.rst

@@ -722,7 +722,7 @@ cookies (assumes Unix/Netscape convention for location of the cookies file)::
 
    import os, http.cookiejar, urllib.request
    cj = http.cookiejar.MozillaCookieJar()
-   cj.load(os.path.join(os.environ["HOME"], ".netscape/cookies.txt"))
+   cj.load(os.path.join(os.path.expanduser("~"), ".netscape", "cookies.txt"))
    opener = urllib.request.build_opener(urllib.request.HTTPCookieProcessor(cj))
    r = opener.open("http://example.com/")
 

Doc/library/readline.rst

@@ -196,7 +196,7 @@ normally be executed automatically during interactive sessions from the user's
 
    import os
    import readline
-   histfile = os.path.join(os.environ["HOME"], ".pyhist")
+   histfile = os.path.join(os.path.expanduser("~"), ".pyhist")
    try:
        readline.read_history_file(histfile)
    except IOError:

Doc/library/sys.rst

@@ -239,33 +239,22 @@ always available.
    The struct sequence *flags* exposes the status of command line flags. The
    attributes are read only.
 
-   +------------------------------+------------------------------------------+
-   | attribute                    | flag                                     |
-   +==============================+==========================================+
-   | :const:`debug`               | -d                                       |
-   +------------------------------+------------------------------------------+
-   | :const:`division_warning`    | -Q                                       |
-   +------------------------------+------------------------------------------+
-   | :const:`inspect`             | -i                                       |
-   +------------------------------+------------------------------------------+
-   | :const:`interactive`         | -i                                       |
-   +------------------------------+------------------------------------------+
-   | :const:`optimize`            | -O or -OO                                |
-   +------------------------------+------------------------------------------+
-   | :const:`dont_write_bytecode` | -B                                       |
-   +------------------------------+------------------------------------------+
-   | :const:`no_user_site`        | -s                                       |
-   +------------------------------+------------------------------------------+
-   | :const:`no_site`             | -S                                       |
-   +------------------------------+------------------------------------------+
-   | :const:`ignore_environment`  | -E                                       |
-   +------------------------------+------------------------------------------+
-   | :const:`verbose`             | -v                                       |
-   +------------------------------+------------------------------------------+
-   | :const:`bytes_warning`       | -b                                       |
-   +------------------------------+------------------------------------------+
-   | :const:`quiet`               | -q                                       |
-   +------------------------------+------------------------------------------+
+   ============================= =============================
+   attribute                     flag
+   ============================= =============================
+   :const:`debug`                :option:`-d`
+   :const:`division_warning`     :option:`-Q`
+   :const:`inspect`              :option:`-i`
+   :const:`interactive`          :option:`-i`
+   :const:`optimize`             :option:`-O` or :option:`-OO`
+   :const:`dont_write_bytecode`  :option:`-B`
+   :const:`no_user_site`         :option:`-s`
+   :const:`no_site`              :option:`-S`
+   :const:`ignore_environment`   :option:`-E`
+   :const:`verbose`              :option:`-v`
+   :const:`bytes_warning`        :option:`-b`
+   :const:`quiet`                :option:`-q`
+   ============================= =============================
 
    .. versionchanged:: 3.2
       Added ``quiet`` attribute for the new :option:`-q` flag.

Doc/tutorial/interactive.rst

@@ -123,10 +123,7 @@ interpreter. ::
    # bound to the Esc key by default (you can change it - see readline docs).
    #
    # Store the file in ~/.pystartup, and set an environment variable to point
-   # to it:  "export PYTHONSTARTUP=/home/user/.pystartup" in bash.
-   #
-   # Note that PYTHONSTARTUP does *not* expand "~", so you have to put in the
-   # full path to your home directory.
+   # to it:  "export PYTHONSTARTUP=~/.pystartup" in bash.
 
    import atexit
    import os