fix: Generating files from array not working

As stated above, I'm unable to generate an array of files following the same structure as the [todo example](https://github.com/felangel/mason/tree/master/bricks/todos)

This is the string I'm using to generate the file list:
```
{{#branches}}{{#snakeCase}}{{{.}}}{{/snakeCase}}_branch.dart{{/branches}}
```

This is the result

When using double moustache dot `{{.}}` instead of triple moustache `{{{.}}}`, I get the following result:

This is the closest I got, but well... The picture talks for itself.

What am I doing wrong? I'm sure I'm following the same pattern as in the todos example.