[galaxy-dev] rename output dataset in workflow - input dataset variable

Hello, I want to rename ouput datasets in a workflow in such a way that the name contains the name of the input dataset. I could not find instructions in the manual (and this info is missing in the Workflow editor - would be really helpful there!). I tried #{input}, e.g. "stats on: #{input}" (with no quotes), but I keep getting just "stats on:" The variable is empty. When I use ${input}, I get a variable field in the workflow form (I do not want this). My G. instance: Galaxy changeset: d1e1beeb532239250396dd8fbdc0156508c6744e <https://bitbucket.org/galaxy/galaxy-central/commits/d1e1beeb532239250396dd8fbdc0156508c6744e> Can anyone help me, please? Jan