Please change "-strike out-" to "--strike out--".  After testing against real pages, I quickly found that the single dash -strike out- syntax was not going to work, so I changed the syntax (part of [the pull](https://github.com/Sage-Bionetworks/SynapseWebClient/pull/436) for SWC-697). For example (from the HPN-DREAM challenge): "Sub-challenge 2: Time-course Prediction"