CI job for black formatting

Author: kchason

.github/workflows/ci.yml

@@ -35,6 +35,10 @@ jobs:
       uses: actions/setup-python@v2
       with:
         python-version: ${{ matrix.python-version }}
+    - name: Pre-commit Checks
+      run: |
+        pip -q install pre-commit
+        pre-commit run --all-files
     - name: Start from clean state
       run: make clean
     - name: Run tests

.pre-commit-config.yaml

@@ -0,0 +1,5 @@
+repos:
+-   repo: https://github.com/psf/black
+    rev: 22.1.0
+    hooks:
+    -   id: black

CONTRIBUTE.md

@@ -32,3 +32,14 @@ make check
 git commit -m "Update CASE ontology pointer to version 0.6.0" dependencies/CASE case_utils/ontology/version_info.py
 git commit -m "Build CASE 0.6.0.ttl" case_utils/ontology/case-0.6.0.ttl
 ```
+
+This project uses [the `pre-commit` tool](https://pre-commit.com/) for linting The easiest way to install it is with `pip`:
+```bash
+pip install pre-commit
+pre-commit --version
+```
+
+The `pre-commit` tool hooks into Git's commit machinery to run a set of linters and static analyzers over each change. To install `pre-commit` into Git's hooks, run:
+```bash
+pre-commit install
+```