MNT: Replace master with main

Author: pllim

CONTRIBUTING.rst

@@ -6,7 +6,7 @@ Overview
 
 Each tutorial is a `Jupyter notebook <http://jupyter.org/>`_ file. Each notebook is saved in a separate directory within the ``tutorials/notebooks``
 subdirectory in this project. For an example, let's look at the source notebook
-of the `FITS-header <https://github.com/astropy/astropy-tutorials/tree/master/tu
+of the `FITS-header <https://github.com/astropy/astropy-tutorials/tree/main/tu
 torials/notebooks/FITS-header/>`_ tutorial. Within
 ``tutorials/notebooks/FITS-header``, there is a single Jupyter notebook file
 that contains the text and code for the tutorial, and any small data files used
@@ -76,7 +76,7 @@ Code
     * Variable names should be descriptive, e.g., ``galaxy_mass``, ``u_mag``
 * Use the print function explicitly to display information about variables
 * As much as possible, comply with `PEP8 <https://www.python.org/dev/peps/pep-0008/>`_.
-* As much as possible, comply with Jupyter notebook style guides - `STScI style guide <https://github.com/spacetelescope/style-guides/blob/master/guides/jupyter-notebooks.md>`_ and `Official Coding Style <https://jupyter.readthedocs.io/en/latest/development_guide/coding_style.html>`_.
+* As much as possible, comply with Jupyter notebook style guides - `STScI style guide <https://github.com/spacetelescope/style-guides/blob/main/guides/jupyter-notebooks.md>`_ and `Official Coding Style <https://jupyter.readthedocs.io/en/latest/development_guide/coding_style.html>`_.
 * Imports
     * Do not use ``from package import *``; import packages, classes, and
       functions explicitly
@@ -188,7 +188,7 @@ your ``requirements.txt`` file would look like:
     numpy>=1.13
 
 To see an example, have a look at the FITS-header `requirements.txt file <https:
-//github.com/astropy/astropy-tutorials/blob/master/tutorials/notebooks/FITS-head
+//github.com/astropy/astropy-tutorials/blob/main/tutorials/notebooks/FITS-head
 er/requirements.txt>`_.
 
 Push the notebook and other files from your local branch up to your fork of the

README.rst

@@ -22,7 +22,7 @@ You can also get started quickly using `Binder <http://mybinder.org>`_ to run th
 your web browser within a remote server:
 
 .. image:: http://mybinder.org/badge.svg
-    :target: https://mybinder.org/v2/gh/astropy/astropy-tutorials/master?filepath=tutorials/notebooks
+    :target: https://mybinder.org/v2/gh/astropy/astropy-tutorials/main?filepath=tutorials/notebooks
 
 
 Contributing tutorial material

scripts/convert.py

@@ -131,7 +131,7 @@ def convert(self, remove_executed=False):
             return self._rst_path
 
         # Initialize the resources dict - see:
-        # https://github.com/jupyter/nbconvert/blob/master/nbconvert/nbconvertapp.py#L327
+        # https://github.com/jupyter/nbconvert/blob/main/nbconvert/nbconvertapp.py#L327
         resources = {}
         resources['config_dir'] = '' # we don't need to specify config
         resources['unique_key'] = self.nb_name

scripts/tests/test_convert.py

@@ -10,7 +10,7 @@
 tests_path = path.split(path.abspath(__file__))[0]
 
 def test_convert_succeed():
-    # With the current master version of nbconvert, we can allow errors
+    # With the current main version of nbconvert, we can allow errors
     # per-cell. This notebook, even though it raises an exception, should still
     # execute fine:
     nbc = NBConverter(path.join(tests_path, 'test-succeed.ipynb'))

tutorials/_static/bootstrap_sandstone.css

@@ -8,7 +8,7 @@
 .. raw:: html
 
     <a href="../_static/{{ nb_name }}/{{ nb_name }}.ipynb"><button id="download">Download tutorial notebook</button></a>
-    <a href="https://beta.mybinder.org/v2/gh/astropy/astropy-tutorials/master?filepath=/tutorials/notebooks/{{ nb_name }}/{{ nb_name }}.ipynb"><button id="binder">Interactive tutorial notebook</button></a>
+    <a href="https://beta.mybinder.org/v2/gh/astropy/astropy-tutorials/main?filepath=/tutorials/notebooks/{{ nb_name }}/{{ nb_name }}.ipynb"><button id="binder">Interactive tutorial notebook</button></a>
 
     <div id="spacer"></div>
 
@@ -31,7 +31,7 @@
     <div id="spacer"></div>
 
     <a href="../_static/{{ nb_name }}/{{ nb_name }}.ipynb"><button id="download">Download tutorial notebook</button></a>
-    <a href="https://beta.mybinder.org/v2/gh/astropy/astropy-tutorials/master?filepath=/tutorials/notebooks/{{ nb_name }}/{{ nb_name }}.ipynb"><button id="binder">Interactive tutorial notebook</button></a>
+    <a href="https://beta.mybinder.org/v2/gh/astropy/astropy-tutorials/main?filepath=/tutorials/notebooks/{{ nb_name }}/{{ nb_name }}.ipynb"><button id="binder">Interactive tutorial notebook</button></a>
 
 {% endblock %}
 

tutorials/astropy.tpl

@@ -8,7 +8,7 @@ Documentation on tutorials infrastructure
 Overview
 --------
 
-Tutorials are written as Jupyter notebooks on the ``master`` branch of the
+Tutorials are written as Jupyter notebooks on the ``main`` branch of the
 ``astropy/astropy-tutorials`` repository in ``tutorials/notebooks/``. These
 notebook files do not contain output in order to simplify version-controlling
 the files.
@@ -22,7 +22,7 @@ We use `CircleCI <https://circleci.com>`_ to do the Sphinx build, which is then
 pushed to the ``gh-pages`` branch of the repository and served by GitHub. The
 notebooks are first converted to RST files during the Sphinx build by doing the
 conversion at the end of the `Sphinx configuration file
-<https://github.com/astropy/astropy-tutorials/blob/master/tutorials/conf.py>`_.
+<https://github.com/astropy/astropy-tutorials/blob/main/tutorials/conf.py>`_.
 
 Why not use nbsphinx?
 ---------------------
@@ -73,7 +73,7 @@ Building the tutorials page locally
 -----------------------------------
 
 For this, you can use the `Makefile
-<https://github.com/astropy/astropy-tutorials/blob/master/Makefile>`_ at the
+<https://github.com/astropy/astropy-tutorials/blob/main/Makefile>`_ at the
 top-level of the tutorials repository. From the root level of the cloned or
 downloaded repository::
 
@@ -131,7 +131,7 @@ Marking a cell with an intentional error
 
 Edit the cell metadata of the cell in which you would like to raise an exception
 and add the following to the top-level JSON: ``"tags": ["raises-exception"]``
-This tag is recognized by the latest (master) version of nbconvert.
+This tag is recognized by the latest (main) version of nbconvert.
 
 Automatically Strip Output and Notebook Metadata
 ------------------------------------------------

tutorials/dev.rst

@@ -3,7 +3,7 @@
      id="dLabelGlobalToc"
      data-toggle="dropdown"
      data-target="#"
-     href="{{ pathto(master_doc) }}">{{ theme_navbar_site_name }} <b class="caret"></b></a>
+     href="{{ pathto(main_doc) }}">{{ theme_navbar_site_name }} <b class="caret"></b></a>
   <ul class="dropdown-menu globaltoc"
       role="menu"
       aria-labelledby="dLabelGlobalToc">{{ toctree(maxdepth=theme_globaltoc_depth|toint, collapse=False, includehidden=theme_globaltoc_includehidden|tobool) }}</ul>