Allow NestedTemplateOnce to render directly to buffer when no filter is present #171
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Hi there,
I noticed that using the "Nested template" syntax generates .render_once() for those templates, which seems to use intermediate buffer. But TemplateOnce also has a .render_once_to() function. So it seems that when the template is not using any filter we can write the template directly to output buffer.
I update the translator.rs to do that, also updated the test (for NestedTemplateOnce without filter). The nested template with filter works as before.
Also I removed the 'suffix' parameter completely, as it seems like it was there just to insert the .render_once() call.