Return last expr of block as result of TB.tx() and no-op outside of container
Return last expr of block as result of TB.tx() and no-op outside of container

mje113/torquebox,ksw2599/torquebox,torquebox/torquebox-release,ksw2599/torquebox,samwgoldman/torquebox,samwgoldman/torquebox,torquebox/torquebox-release,vaskoz/torquebox,torquebox/torquebox,mje113/torquebox,ksw2599/torquebox,mje113/torquebox,torquebox/torquebox-release,samwgoldman/torquebox,torquebox/torquebox,torquebox/torquebox,vaskoz/torquebox,samwgoldman/torquebox,vaskoz/torquebox,vaskoz/torquebox,mje113/torquebox,ksw2599/torquebox,torquebox/torquebox,torquebox/torquebox-release