Initial pre-commit application

Author: jasonb5

.github/PULL_REQUEST_TEMPLATE

@@ -4,13 +4,13 @@ Lines should be wrapped at about 72 characters. Please also update
 the CIME documentation, if necessary, in doc/source/rst and indicate
 below if you need to have the gh-pages html regenerated.]
 
-Test suite: 
-Test baseline: 
-Test namelist changes: 
+Test suite:
+Test baseline:
+Test namelist changes:
 Test status: [bit for bit, roundoff, climate changing]
 
 Fixes [CIME Github issue #]
 
-User interface changes?: 
+User interface changes?:
 
 Update gh-pages html (Y/N)?:

.gitignore

@@ -22,4 +22,3 @@ scripts/Tools/JENKINS*
 components
 libraries
 share
-

.pre-commit-config.yaml

@@ -0,0 +1,10 @@
+exclude: 'utils/'
+
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.0.1
+    hooks:
+      - id: check-xml
+        files: config/
+      - id: end-of-file-fixer
+      - id: trailing-whitespace

CONTRIBUTING.md

@@ -27,7 +27,7 @@ find useful? Have a few minutes to tackle an issue? In this guide we will get yo
 integrated into contributing to CIME!
 
 ## What Can I Do?
-* Tackle any unassigned [issues](https://github.com/ESMCI/CIME/issues) you wish!  
+* Tackle any unassigned [issues](https://github.com/ESMCI/CIME/issues) you wish!
 
 * Contribute code you already have. It doesn’t need to be perfect! We will help you clean
   things up, test it, etc.