No whitespace allowed when writing variables in views.yaml

[despens]

In views.yaml it isn't possible to write, for instance

views:
  - output: "{{ id }}.html"
    query: "query.rq"
    template: "template.html"

Variables always need to be directly enclosed by double curly braces like this {{id}}. This is kind of confusing because in the rest of the template substitutions in snowman whitespace is not a problem.

[Abbe98]

Yeah agreed, it's also has the added benefit of readability.

[Abbe98]

My intent is to include this in next week's patch release, as it's small in scope and 0.7.0 is unlikely to be released until priority efforts like #99 and #91 have landed.