fixing default branch name

CONTRIBUTING.md

@@ -26,7 +26,7 @@ if applicable.
 
 ### Do you intend to add a new feature or change an existing one?
 
-First, read the [VISION](https://github.com/dfm/emcee/blob/master/VISION.md)
+First, read the [VISION](https://github.com/dfm/emcee/blob/main/VISION.md)
 notes and make sure that your feature is consistent with those. In particular,
 modifications of the core algorithm or additions of new algorithms are
 unlikely to be approved. If your feature seems to be consistent, suggest it on

README.rst

@@ -8,11 +8,11 @@ emcee
 .. image:: https://github.com/dfm/emcee/workflows/Tests/badge.svg
     :target: https://github.com/dfm/emcee/actions?query=workflow%3ATests
 .. image:: http://img.shields.io/badge/license-MIT-blue.svg?style=flat
-    :target: https://github.com/dfm/emcee/blob/master/LICENSE
+    :target: https://github.com/dfm/emcee/blob/main/LICENSE
 .. image:: http://img.shields.io/badge/arXiv-1202.3665-orange.svg?style=flat
     :target: https://arxiv.org/abs/1202.3665
-.. image:: https://coveralls.io/repos/github/dfm/emcee/badge.svg?branch=master&style=flat&v=2
-    :target: https://coveralls.io/github/dfm/emcee?branch=master
+.. image:: https://coveralls.io/repos/github/dfm/emcee/badge.svg?branch=main&style=flat&v=2
+    :target: https://coveralls.io/github/dfm/emcee?branch=main
 .. image:: https://readthedocs.org/projects/emcee/badge/?version=latest
     :target: http://emcee.readthedocs.io/en/latest/?badge=latest
 

docs/index.rst

@@ -20,11 +20,11 @@ it is being actively developed on `GitHub <https://github.com/dfm/emcee>`_.
 .. image:: https://github.com/dfm/emcee/workflows/Tests/badge.svg
     :target: https://github.com/dfm/emcee/actions?query=workflow%3ATests
 .. image:: https://img.shields.io/badge/license-MIT-blue.svg?style=flat
-    :target: https://github.com/dfm/emcee/blob/master/LICENSE
+    :target: https://github.com/dfm/emcee/blob/main/LICENSE
 .. image:: https://img.shields.io/badge/arXiv-1202.3665-orange.svg?style=flat
     :target: https://arxiv.org/abs/1202.3665
-.. image:: https://coveralls.io/repos/github/dfm/emcee/badge.svg?branch=master&style=flat
-    :target: https://coveralls.io/github/dfm/emcee?branch=master
+.. image:: https://coveralls.io/repos/github/dfm/emcee/badge.svg?branch=main&style=flat
+    :target: https://coveralls.io/github/dfm/emcee?branch=main
 
 
 Basic Usage
@@ -64,7 +64,7 @@ should have what you need.
 
 We welcome bug reports, patches, feature requests, and other comments via `the GitHub
 issue tracker <https://github.com/dfm/emcee/issues>`_, but you should check out the
-`contribution guidelines <https://github.com/dfm/emcee/blob/master/CONTRIBUTING.md>`_
+`contribution guidelines <https://github.com/dfm/emcee/blob/main/CONTRIBUTING.md>`_
 first.
 If you have a question about the use of emcee, please post it to `the users list
 <https://groups.google.com/forum/#!forum/emcee-users>`_ instead of the issue tracker.