Bad formatting example

.github/workflows/reviewdog.yml

@@ -0,0 +1,42 @@
+name: linter-checks
+on: [pull_request]
+jobs:
+  cpp:
+    permissions:
+      contents: read
+      checks: write
+      issues: write
+      pull-requests: write
+    name: pre-commit
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.11
+
+      - name: Cache pre-commit hooks
+        uses: actions/cache@v2
+        with:
+          path: ~/.cache/pre-commit
+          key: ${{ runner.os }}-precommit-${{ hashFiles('.pre-commit-config.yaml') }}
+
+      - name: Install dependencies
+        run: |
+          pip install pre-commit
+
+      - name: Run pre-commit hooks
+        run: |
+          pre-commit run --all-files
+        continue-on-error: true
+
+      - name: suggester / pre-commit
+        uses: reviewdog/action-suggester@v1
+        with:
+          tool_name: pre-commit
+          fail_on_error: true
+          level: warning
+

.pre-commit-config.yaml

@@ -0,0 +1,33 @@
+# See https://pre-commit.com for more information
+# See https://pre-commit.com/hooks.html for more hooks
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v3.2.0
+    hooks:
+    -   id: trailing-whitespace
+    -   id: end-of-file-fixer
+    -   id: check-yaml
+    -   id: check-added-large-files
+
+    # Clang-format for C++
+    # This brings in a portable version of clang-format.
+    # See also: https://github.com/ssciwr/clang-format-wheel
+  - repo: https://github.com/pre-commit/mirrors-clang-format
+    rev: v18.1.8
+    hooks:
+    - id: clang-format
+      types_or: [c++, c]
+
+    # CMake linting and formatting
+  - repo: https://github.com/BlankSpruce/gersemi
+    rev: 0.15.1
+    hooks:
+    - id: gersemi
+      name: CMake linting
+
+    # Markdown linting
+    # Config file: .markdownlint.yaml
+  - repo: https://github.com/igorshubovych/markdownlint-cli
+    rev: v0.42.0
+    hooks:
+    - id: markdownlint

src/beman/exemplar/badly_formatted_main.cpp

@@ -0,0 +1,3 @@
+int main()
+{
+  return 0;          }