Refer to "main" branch of circuitpython

CONTRIBUTING.md

@@ -1,6 +1,6 @@
 # Contributing
 Please note that this project is released with a
-[Contributor Code of Conduct](https://github.com/adafruit/circuitpython/blob/master/CODE_OF_CONDUCT.md).
+[Contributor Code of Conduct](https://github.com/adafruit/circuitpython/blob/main/CODE_OF_CONDUCT.md).
 By participating in this project you agree to abide by its terms. Participation
 covers any forum used to converse about CircuitPython including unofficial and official spaces. Failure to do
 so will result in corrective actions such as time out or ban from the project.

README.rst

@@ -55,12 +55,12 @@ Contributing
 ------------
 
 See
-`CONTRIBUTING.md <https://github.com/adafruit/circuitpython/blob/master/CONTRIBUTING.md>`__
+`CONTRIBUTING.md <https://github.com/adafruit/circuitpython/blob/main/CONTRIBUTING.md>`__
 for full guidelines but please be aware that by contributing to this
 project you are agreeing to the `Code of
-Conduct <https://github.com/adafruit/circuitpython/blob/master/CODE_OF_CONDUCT.md>`__.
+Conduct <https://github.com/adafruit/circuitpython/blob/main/CODE_OF_CONDUCT.md>`__.
 Contributors who follow the `Code of
-Conduct <https://github.com/adafruit/circuitpython/blob/master/CODE_OF_CONDUCT.md>`__
+Conduct <https://github.com/adafruit/circuitpython/blob/main/CODE_OF_CONDUCT.md>`__
 are welcome to submit pull requests and they will be promptly reviewed
 by project admins. Please join the
 `Discord <https://adafru.it/discord>`__ too.

docs/README.md

@@ -5,7 +5,7 @@ The latest documentation can be found at:
 http://circuitpython.readthedocs.io/en/latest/
 
 The documentation you see there is generated from the files in the whole tree:
-https://github.com/adafruit/circuitpython/tree/master
+https://github.com/adafruit/circuitpython/tree/main
 
 Building the documentation locally
 ----------------------------------

docs/design_guide.rst

@@ -3,7 +3,7 @@ Design Guide
 
 This guide covers a variety of development practices for CircuitPython core and library APIs. These
 APIs are both `built-into CircuitPython
-<https://github.com/adafruit/circuitpython/tree/master/shared-bindings>`_ and those that are
+<https://github.com/adafruit/circuitpython/tree/main/shared-bindings>`_ and those that are
 `distributed on GitHub <https://github.com/search?utf8=%E2%9C%93&q=topic%3Acircuitpython&type=>`_
 and in the `Adafruit <https://github.com/adafruit/Adafruit_CircuitPython_Bundle>`_ and `Community
 <https://github.com/adafruit/CircuitPython_Community_Bundle/>`_ bundles. Consistency with these

tools/codestats.sh

@@ -90,9 +90,9 @@ else
     last_rev="v1.0"
 fi
 
-# get a list of hashes between last revision (exclusive) and master
-hashes=$(git log --format=format:"%H" --reverse ${last_rev}..master)
-#hashes=$(git log --format=format:"%H" --reverse ${last_rev}..master | $AWK '{if (NR % 10 == 0) print $0}') # do every 10th one
+# get a list of hashes between last revision (exclusive) and main
+hashes=$(git log --format=format:"%H" --reverse ${last_rev}..main)
+#hashes=$(git log --format=format:"%H" --reverse ${last_rev}..main | $AWK '{if (NR % 10 == 0) print $0}') # do every 10th one
 
 for hash in $hashes; do
 
@@ -182,6 +182,6 @@ EOF
 
 done
 
-# checkout master and cleanup
-git checkout master
+# checkout main and cleanup
+git checkout main
 $RM $pystoneavg