Exit gracefully if no changes have been made

Author: kiran-garre

docs-generation/create-docs-pr.sh

@@ -1,17 +1,15 @@
 #!/bin/bash
 set -e
 
-# Ensure we have changes to merge
-if [ -z "$(git status --porcelain -- . ':!pr-contents.txt')" ]; then
-    echo "No changes to commit"
-    exit 0
-fi
-
 git config user.name "docs-generator[bot]"
 git config user.email "docs-generator[bot]@amazon.com"
 
 # Push (branch should have already been created in update-docs.sh)
 git add docs
+if git diff --cached --quiet; then
+    echo "No changes to commit"
+    exit 0
+fi
 git commit -m "Update docs based on PR #$PR_NUMBER
 
 Auto-generated by Q"