Prepare to rename default branch to main

.github/CONTRIBUTING.md

@@ -5,7 +5,7 @@ possible.
 ## Pull Requests
 We actively welcome your pull requests.
 
-1. Fork the repo and create your branch from `master`.
+1. Fork the repo and create your branch from `main`.
 2. Add tests for your code using [Common Test](https://erlang.org/doc/apps/common_test/basics_chapter.html).
 3. If you've changed APIs, update the documentation.
 4. Ensure the test suite passes using `rebar3 ct`.

.github/workflows/ci.yml

@@ -5,7 +5,7 @@ on:
       - '*'
   pull_request:
     branches:
-      - master
+      - main
 jobs:
   build:
     strategy:

README.md

@@ -407,7 +407,7 @@ The [release process](./RELEASE.md) requires a few steps, updating the [CHANGELO
 
 ### Decision Documents
 
-[Formatting Decisions](https://github.com/WhatsApp/erlfmt/blob/master/doc/Readme.md) documents are intended to explain our reasoning for making certain formatting decisions.
+[Formatting Decisions](https://github.com/WhatsApp/erlfmt/blob/main/doc/Readme.md) documents are intended to explain our reasoning for making certain formatting decisions.
 
 ### License
 

RELEASE.md

@@ -2,7 +2,7 @@
 
 The release process requires a few steps.
 
-1. Update the [CHANGELOG.md](https://github.com/WhatsApp/erlfmt/blob/master/CHANGELOG.md) file.
+1. Update the [CHANGELOG.md](https://github.com/WhatsApp/erlfmt/blob/main/CHANGELOG.md) file.
 ```
     ### v<major>.<minor>.<bugfix>
 

doc/ErlangFormatterComparison.md

@@ -181,7 +181,7 @@ The trailing comment is moved to the line above and the above comment is moved t
 Other Erlang formatters have several configurable options, which can adjust the format.
 
 `erlfmt` is very opinionated and only a single option that will change the format, `print-width` the maximum line length, which has a default of 100.
-See the reasoning behind this decision [here](https://github.com/WhatsApp/erlfmt/blob/master/doc/FormattingDecisionDefaultWidth.md).
+See the reasoning behind this decision [here](https://github.com/WhatsApp/erlfmt/blob/main/doc/FormattingDecisionDefaultWidth.md).
 
 ## Preserving Representation
 
@@ -328,7 +328,7 @@ x() -> Foo = [short, list].
 Adding a comment to the top of the file `%%% % @format` and running `erlfmt` with the `--require-pragma` option, will result in only files that have this comment will be formatted.
 
 Adding a comment `%% erlfmt-ignore` above a top level expression, will skip over this single expression and continue to format the rest of the file.
-[Here](https://github.com/WhatsApp/erlfmt/blob/master/doc/FormattingDecisionIgnore.md) you can see the reasoning behind including this option.
+[Here](https://github.com/WhatsApp/erlfmt/blob/main/doc/FormattingDecisionIgnore.md) you can see the reasoning behind including this option.
 
 ## Speed
 

test/erlfmt_format_SUITE.erl

@@ -810,7 +810,7 @@ binary_operator_more(Config) when is_list(Config) ->
 
 %% These formattings might not be exactly what we want in some cases,
 %% see our reasoning for why we stuck to this format here:
-%% https://github.com/WhatsApp/erlfmt/blob/master/doc/FormattingDecisionAssociative.md
+%% https://github.com/WhatsApp/erlfmt/blob/main/doc/FormattingDecisionAssociative.md
 binary_operator_equal(Config) when is_list(Config) ->
     ?assertFormat(
         "A = B = c(\n"