Added info on use as pre-commit hook

Author: domdfcoding

README.rst

@@ -150,3 +150,18 @@ Code           Description
 ============== =====================================================================
 SXL001         Double backticked variable should be a link to Python documentation.
 ============== =====================================================================
+
+Use as a pre-commit hook
+--------------------------
+
+See `pre-commit <https://github.com/pre-commit/pre-commit>`_ for instructions
+
+Sample `.pre-commit-config.yaml`:
+
+```yaml
+-   repo: https://gitlab.com/pycqa/flake8
+    rev: 3.8.1
+    hooks:
+    -   id: flake8
+        additional_dependencies: [flake8-sphinx-links==0.0.4]
+```

doc-source/index.rst

@@ -149,6 +149,23 @@ Installation
 
 .. end installation
 
+
+Use as a pre-commit hook
+--------------------------
+
+See `pre-commit <https://github.com/pre-commit/pre-commit>`_ for instructions
+
+Sample `.pre-commit-config.yaml`:
+
+```yaml
+-   repo: https://gitlab.com/pycqa/flake8
+    rev: 3.8.1
+    hooks:
+    -   id: flake8
+        additional_dependencies: [flake8-sphinx-links==0.0.4]
+```
+
+
 .. toctree::
 	:hidden: