feat(CI): add the GitHub Super Linter

The GitHub Super Linter is a more robust and better supported
tool than the current GitHub Actions we are using.

Running these checks:

ERROR_ON_MISSING_EXEC_BIT: true
VALIDATE_BASH: true
VALIDATE_BASH_EXEC: true
VALIDATE_EDITORCONFIG: true
VALIDATE_MARKDOWN: true
VALIDATE_SHELL_SHFMT: true
VALIDATE_YAML: true

https://github.com/marketplace/actions/super-linter
https://github.com/github/super-linter

Added the GitHub Super Linter badge to the README.

Also updated the pre-commit framework and added
more documentation on pre-commit.

Added one more pre-commit check: check-executables-have-shebangs

Added one extra check for merge conflicts to our
GitHub Actions.

EditorConfig and Markdown linting.

Minor grammar and spelling fixes.

Update linter.yml

1 files changed, 4 insertions, 4 deletions

diff --git a/test/t/nameerror.rb b/test/t/nameerror.rb
index 28682bedc..9d2e2a470 100644
--- a/test/t/nameerror.rb
+++ b/test/t/nameerror.rb
@@ -20,9 +20,9 @@ assert('NameError#name', '15.2.31.2.1') do
 end
 
 assert('NameError#initialize', '15.2.31.2.2') do
-   e = NameError.new('a', :foo)
+  e = NameError.new('a', :foo)
 
-   assert_equal NameError, e.class
-   assert_equal 'a', e.message
-   assert_equal :foo, e.name
+  assert_equal NameError, e.class
+  assert_equal 'a', e.message
+  assert_equal :foo, e.name
 end