A few more hg "default" to git "master" refs

Author: ned-deily

buildbots.rst

@@ -38,7 +38,7 @@ There are three ways of visualizing recent build results:
   https://code.google.com/archive/p/bbreport. Installing it is trivial: just add
   the directory containing ``bbreport.py`` to your system path so that
   you can run it from any filesystem location.  For example, if you want
-  to display the latest build results on the development ("default") branch,
+  to display the latest build results on the development ("master") branch,
   type::
 
       bbreport.py -q 3.x

index.rst

@@ -87,7 +87,7 @@ Status of Python branches
 +------------------+--------------+-------------+----------------+----------------+----------------------------------------------------------------------------+
 | Branch           | Schedule     | Status      | First release  | End-of-life    | Comment                                                                    |
 +==================+==============+=============+================+================+============================================================================+
-| master           | :pep:`537`   | features    | *2018-06-15*   | *2023-06-15*   | The default branch is currently the future version Python 3.7.             |
+| master           | :pep:`537`   | features    | *2018-06-15*   | *2023-06-15*   | The master branch is currently the future version Python 3.7.              |
 +------------------+--------------+-------------+----------------+----------------+----------------------------------------------------------------------------+
 | 3.6              | :pep:`494`   | bugfix      | 2016-12-23     | *2021-12-23*   | `Most recent binary release: Python 3.6.3                                  |
 |                  |              |             |                |                | <https://www.python.org/downloads/release/python-363/>`_                   |
@@ -111,7 +111,7 @@ on python-dev (March 2017).
 
 Status:
 
-:features: new features are only added to the default branch, this branch
+:features: new features are only added to the master branch, this branch
     accepts any kind of change.
 :bugfix: bugfixes and security fixes are accepted, new binaries are still
     released.