fix potential empty whitespace

Author: joelhawksley

.github/workflows/lint.yml

@@ -64,7 +64,7 @@ jobs:
         run: |
           # Filter out Gemfile.lock files from changed files
           ALL_FILES="${{needs.changedfiles.outputs.all}}"
-          FILTERED_FILES=$(echo "$ALL_FILES" | tr ' ' '\n' | grep -v '^Gemfile\.lock$' | grep -v '^docs/Gemfile\.lock$' | tr '\n' ' ')
+          FILTERED_FILES=$(echo "$ALL_FILES" | tr ' ' '\n' | grep -v '^Gemfile\.lock$' | grep -v '^docs/Gemfile\.lock$' | tr '\n' ' ' | xargs)
 
           # Only require changelog if there are other files changed
           if [[ -n "$FILTERED_FILES" ]] && [[ ! "${{needs.changedfiles.outputs.markdown}}" == *"CHANGELOG.md"* ]]; then