Is there an easy way to include the display name of the job in the email subject?
Maybe there is an environment variable for this?
I know it should be possible because the default functionality (email notification) in jenkins already provides this information in the email subject.
The correct environemnt variable which I was looking for is
$BUILD_DISPLAY_NAME
The display name of the current build, which is something like "#153" by default.
Thanks at @maniframer to provide the link for getting more built-in environments.