Rendered templates can start with spaces

This is useful when you have a template like this:

"""
{{user}}
  <div>{{name}}</div>
  <div>{{age}}</div>
{{/user}}
"""

After Mustache renders the template, the result is this:

"""
  <div>Pablo</div>
  <div>33></div>
"""

The string above starts with spaces, and jQuery chokes
on it because it expects it to start with the '<' character