BlueOcean doesn't display newlines and HTML also always gets escaped, so there is no way to manually wrap lines in the build description.

We are updating our currentBuild.description in the JenkinsFile with some path of an build artifact that is getting uploaded in the course of the build process.

E.g.

stage('upload') {
...
currentBuild.description += "Uploaded ${destination}\n";
}

can result in a build description of:

Uploaded /BUILDS/something/v1.0.0/linux/something.tar.gz
Uploaded Z:\BUILDS\something\v1.0.0\windows\something.zip

Current display on the build page in BlueOcean:

Expected display: