Fix Sphinx warnings

Author: vstinner

Doc/library/getopt.rst

@@ -14,15 +14,15 @@
 .. note::
 
    The :mod:`getopt` module is a parser for command line options whose API is
-   designed to be familiar to users of the C :c:func:`getopt` function. Users who
-   are unfamiliar with the C :c:func:`getopt` function or who would like to write
+   designed to be familiar to users of the C :c:func:`!getopt` function. Users who
+   are unfamiliar with the C :c:func:`!getopt` function or who would like to write
    less code and get better help and error messages should consider using the
    :mod:`argparse` module instead.
 
 --------------
 
 This module helps scripts to parse the command line arguments in ``sys.argv``.
-It supports the same conventions as the Unix :c:func:`getopt` function (including
+It supports the same conventions as the Unix :c:func:`!getopt` function (including
 the special meanings of arguments of the form '``-``' and '``--``').  Long
 options similar to those supported by GNU software may be used as well via an
 optional third argument.
@@ -37,11 +37,11 @@ exception:
    be parsed, without the leading reference to the running program. Typically, this
    means ``sys.argv[1:]``. *shortopts* is the string of option letters that the
    script wants to recognize, with options that require an argument followed by a
-   colon (``':'``; i.e., the same format that Unix :c:func:`getopt` uses).
+   colon (``':'``; i.e., the same format that Unix :c:func:`!getopt` uses).
 
    .. note::
 
-      Unlike GNU :c:func:`getopt`, after a non-option argument, all further
+      Unlike GNU :c:func:`!getopt`, after a non-option argument, all further
       arguments are considered also non-options. This is similar to the way
       non-GNU Unix systems work.
 
@@ -75,7 +75,7 @@ exception:
    non-option argument is encountered.
 
    If the first character of the option string is ``'+'``, or if the environment
-   variable :envvar:`POSIXLY_CORRECT` is set, then option processing stops as
+   variable :envvar:`!POSIXLY_CORRECT` is set, then option processing stops as
    soon as a non-option argument is encountered.
 
 
@@ -85,9 +85,9 @@ exception:
    an option requiring an argument is given none. The argument to the exception is
    a string indicating the cause of the error.  For long options, an argument given
    to an option which does not require one will also cause this exception to be
-   raised.  The attributes :attr:`msg` and :attr:`opt` give the error message and
+   raised.  The attributes :attr:`!msg` and :attr:`!opt` give the error message and
    related option; if there is no specific option to which the exception relates,
-   :attr:`opt` is an empty string.
+   :attr:`!opt` is an empty string.
 
 .. XXX deprecated?
 .. exception:: error