updated error message and fixed the test

.github/workflows/test.yml

@@ -316,7 +316,7 @@ jobs:
         id: changed-files-until
         uses: ./
         with:
-          until: "2022-08-20"
+          until: "2022-08-21"
       - name: Show output
         run: |
           echo '${{ toJSON(steps.changed-files-until.outputs) }}'

diff-sha.sh

@@ -122,7 +122,6 @@ fi
 
 if [[ -n "$PREVIOUS_SHA" && -n "$CURRENT_SHA" && "$PREVIOUS_SHA" == "$CURRENT_SHA" && "$INITIAL_COMMIT" == "false" ]]; then
   echo "::error::Similar commit hashes detected: previous sha: $PREVIOUS_SHA is equivalent to the current sha: $CURRENT_SHA"
-  echo "::error::You seem to be missing 'fetch-depth: 0' or 'fetch-depth: 2'. See https://github.com/tj-actions/changed-files#usage"
   exit 1
 fi