#14558: document the module, argv, and testLoader args of unittest.main.

Doc/library/unittest.rst

@@ -1926,9 +1926,10 @@ Loading and running tests
                    testLoader=unittest.defaultTestLoader, exit=True, verbosity=1, \
                    failfast=None, catchbreak=None, buffer=None, warnings=None)
 
-   A command-line program that runs a set of tests; this is primarily for making
-   test modules conveniently executable.  The simplest use for this function is to
-   include the following line at the end of a test script::
+   A command-line program that loads a set of tests from *module* and runs them;
+   this is primarily for making test modules conveniently executable.
+   The simplest use for this function is to include the following line at the
+   end of a test script::
 
       if __name__ == '__main__':
           unittest.main()
@@ -1939,10 +1940,17 @@ Loading and running tests
       if __name__ == '__main__':
           unittest.main(verbosity=2)
 
+   The *argv* argument can be a list of options passed to the program, with the
+   first element being the program name.  If not specified or ``None``,
+   the values of :data:`sys.argv` are used.
+
    The *testRunner* argument can either be a test runner class or an already
    created instance of it. By default ``main`` calls :func:`sys.exit` with
    an exit code indicating success or failure of the tests run.
 
+   The *testLoader* argument has to be a :class:`TestLoader` instance,
+   and defaults to :data:`defaultTestLoader`.
+
    ``main`` supports being used from the interactive interpreter by passing in the
    argument ``exit=False``. This displays the result on standard output without
    calling :func:`sys.exit`::
@@ -1950,7 +1958,7 @@ Loading and running tests
       >>> from unittest import main
       >>> main(module='test_module', exit=False)
 
-   The ``failfast``, ``catchbreak`` and ``buffer`` parameters have the same
+   The *failfast*, *catchbreak* and *buffer* parameters have the same
    effect as the same-name `command-line options`_.
 
    The *warning* argument specifies the :ref:`warning filter <warning-filter>`
@@ -1962,11 +1970,11 @@ Loading and running tests
    This stores the result of the tests run as the ``result`` attribute.
 
    .. versionchanged:: 3.1
-      The ``exit`` parameter was added.
+      The *exit* parameter was added.
 
    .. versionchanged:: 3.2
-      The ``verbosity``, ``failfast``, ``catchbreak``, ``buffer``
-      and ``warnings`` parameters were added.
+      The *verbosity*, *failfast*, *catchbreak*, *buffer*
+      and *warnings* parameters were added.
 
 
 load_tests Protocol