Improve err msg

pre-commit-staged-check.sh

@@ -14,7 +14,7 @@ case $GIT_INDEX_FILE in
 						echo "Error: Found both staged and unstaged changes when trying to commit with 'git commit -a'."
 						echo "Do two seperate commits with, 'git commit -m ...' and 'git commit -a -m ...'"
 						echo "Or 'git reset .' and then 'git commit -a -m ...' for a single commit"
-						echo "SKIP_GIT_HOOK_STAGED_CHECK=yes or --no-verify to skip check"
+						echo "Use SKIP_GIT_HOOK_STAGED_CHECK=Y or --no-verify to skip check"
 						exit 1
 				fi
 				;;