NIFI-10594 Labels ignore empty lines

[adenes]

Summary

NIFI-10594

Tracking

Please complete the following tracking steps prior to pull request creation.

Issue Tracking

• [x] Apache NiFi Jira issue created

Pull Request Tracking

• [x] Pull Request title starts with Apache NiFi Jira issue number, such as NIFI-00000
• [x] Pull Request commit message starts with Apache NiFi Jira issue number, as such NIFI-00000

Pull Request Formatting

• [x] Pull Request based on current revision of the main branch
• [x] Pull Request refers to a feature branch with one commit containing changes

Verification

Manually tested, see screenshot:

Build

• [ ] Build completed using mvn clean install -P contrib-check
  • [x] JDK 8
  • [x] JDK 11
  • [ ] JDK 17

Licensing

• [ ] New dependencies are compatible with the Apache License 2.0 according to the License Policy
• [ ] New dependencies are documented in applicable LICENSE and NOTICE files

Documentation

• [ ] Documentation formatting appears as expected in rendered files

[markobean]

I built the full code with unit tests using Java 17 (openjdk 17.0.4). So, that checkbox is good to go too.

Works like a charm! Blank lines are properly displayed. Thanks for this simple, but very useful update. +1