ci: add YAML linter

Also, fix YAML lint issues

.github/workflows/lint-yaml.yaml

@@ -0,0 +1,53 @@
+# Generated by Gabo (https://github.com/ashishb/gabo)
+---
+# Run this locally with act - https://github.com/nektos/act
+# act -j lintYaml
+name: Lint YAML
+
+on:  # yamllint disable-line rule:truthy
+  push:
+    branches: [main, master]
+    paths:
+      - '**.yml'
+      - '**.yaml'
+      - '.github/workflows/**.yml'
+      - '.github/workflows/**.yaml'
+  pull_request:
+    branches: [main, master]
+    paths:
+      - '**.yml'
+      - '**.yaml'
+      - '.github/workflows/**.yml'
+      - '.github/workflows/**.yaml'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  lintYaml:
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Check YAML files with linter
+        uses: ibiqlik/action-yamllint@v3
+        with:
+          # All files under base dir
+          file_or_dir: "."
+          config_data: |
+            extends: default
+            yaml-files:
+              - '*.yaml'
+              - '*.yml'
+            rules:
+              document-start:
+                level: warning
+              line-length:
+                level: warning
+              new-line-at-end-of-file:
+                level: warning
+              trailing-spaces:
+                level: warning

.github/workflows/lint.xml

@@ -1,35 +1,35 @@
-This workflow uses actions that are not certified by GitHub.
+---
+# This workflow uses actions that are not certified by GitHub.
 # They are provided by a third-party and are governed by
 # separate terms of service, privacy policy, and support
 # documentation.
 # This workflow will download a prebuilt Ruby version, install dependencies and run tests with Rake
 # For more information see: https://github.com/marketplace/actions/setup-ruby-jruby-and-truffleruby
-
 name: Lint
 
 on:
   push:
-    branches: [ master ]
+    branches: [master]
   pull_request:
-    branches: [ master ]
+    branches: [master]
 
 jobs:
   test:
-
     runs-on: ubuntu-latest
+    timeout-minutes: 15
 
     steps:
-    - uses: actions/checkout@v2
-    - name: Set up Ruby
-    # To automatically get bug fixes and new Ruby versions for ruby/setup-ruby,
-    # change this to (see https://github.com/ruby/setup-ruby#versioning):
-    # uses: ruby/setup-ruby@v1
-      uses: ruby/setup-ruby@v1
-      with:
-        ruby-version: 2.6
-    - name: Install dependencies
-      run: gem install mdl
-    - name: Run tests
-      run: |
-        # Lint - disable some rules - https://github.com/markdownlint/markdownlint/blob/master/docs/RULES.md
-        mdl -r ~MD013,~MD029,~MD033 README.md
+      - uses: actions/checkout@v2
+      - name: Set up Ruby
+        # To automatically get bug fixes and new Ruby versions for ruby/setup-ruby,
+        # change this to (see https://github.com/ruby/setup-ruby#versioning):
+        # uses: ruby/setup-ruby@v1
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: 2.6
+      - name: Install dependencies
+        run: gem install mdl
+      - name: Run tests
+        run: |
+          # Lint - disable some rules - https://github.com/markdownlint/markdownlint/blob/master/docs/RULES.md
+          mdl -r ~MD013,~MD029,~MD033 README.md

.github/workflows/test.yaml

@@ -1,3 +1,4 @@
+---
 # This workflow uses actions that are not certified by GitHub.
 # They are provided by a third-party and are governed by
 # separate terms of service, privacy policy, and support
@@ -9,27 +10,27 @@ name: Test
 
 on:
   push:
-    branches: [ master ]
+    branches: [master]
   pull_request:
-    branches: [ master ]
+    branches: [master]
 
 jobs:
   test:
 
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
-    - name: Set up Ruby
-    # To automatically get bug fixes and new Ruby versions for ruby/setup-ruby,
-    # change this to (see https://github.com/ruby/setup-ruby#versioning):
-    # uses: ruby/setup-ruby@v1
-      uses: ruby/setup-ruby@v1
-      with:
-        ruby-version: 2.6
-    - name: Install dependencies
-      run: gem install awesome_bot
-    - name: Run tests
-      run: |
-        # Some URLs could be flaky, try twice in case the first execution fails.
-        bash run_awesome_bot.sh || bash run_awesome_bot.sh
+      - uses: actions/checkout@v2
+      - name: Set up Ruby
+        # To automatically get bug fixes and new Ruby versions for ruby/setup-ruby,
+        # change this to (see https://github.com/ruby/setup-ruby#versioning):
+        # uses: ruby/setup-ruby@v1
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: 2.6
+      - name: Install dependencies
+        run: gem install awesome_bot
+      - name: Run tests
+        run: |
+          # Some URLs could be flaky, try twice in case the first execution fails.
+          bash run_awesome_bot.sh || bash run_awesome_bot.sh