bug: all builds are failing
I managed to get ava to give us an actual error instead of "Invalid or unexpected token while compiling ejs".

```
  ✖ defaults Rejected promise returned by test

  1 test failed [21:49:29]

  defaults

  /Users/xo/code/lad/node_modules/ejs/lib/ejs.js:605

  Rejected promise returned by test. Reason:

  Error {
    message: 'Could not find matching close tag for "<%=".',
  }

  Template.generateSource (node_modules/ejs/lib/ejs.js:605:15)
  Template.compile (node_modules/ejs/lib/ejs.js:509:12)
  Object.compile (node_modules/ejs/lib/ejs.js:358:16)
  Transformer.render (node_modules/jstransformer/index.js:288:44)
  run (node_modules/kopy/dist/kopy.common.js:158:54)
  Promise.all.fileList.map.relative (node_modules/kopy/dist/kopy.common.js:145:49)
  Ware.ctx (node_modules/kopy/dist/kopy.common.js:145:33)
  Ware.<anonymous> (node_modules/wrap-fn/index.js:75:16)
  Ware.<anonymous> (node_modules/wrap-fn/index.js:57:27)
  next (node_modules/ware/lib/index.js:85:20)
  Ware.<anonymous> (node_modules/wrap-fn/index.js:83:42)
  Ware.<anonymous> (node_modules/wrap-fn/index.js:57:27)
  next (node_modules/ware/lib/index.js:85:20)
  Ware.<anonymous> (node_modules/wrap-fn/index.js:83:42)
  Ware.<anonymous> (node_modules/wrap-fn/index.js:57:27)
  next (node_modules/ware/lib/index.js:85:20)
  Ware.<anonymous> (node_modules/wrap-fn/index.js:83:42)
  Ware.<anonymous> (node_modules/wrap-fn/index.js:57:27)
  next (node_modules/ware/lib/index.js:85:20)
```