Add test case for a bug when using delimiters, partials, and sections together.

examples/delimiters.partial.txt

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+{{text}}
+{{text}}

examples/delimiters_partial.2.html

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+{{=[[ ]]=}}
+{{text}}
+[[={{ }}=]]

examples/delimiters_partial.html

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+{{#enumerate}}
+{{>partial}}
+{{/enumerate}}

examples/delimiters_partial.js

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+var partial_context = {
+  enumerate: [ {text: 'A'}, {text: 'B'} ]
+}