output_helper.html - Initial Values Idea

In a few samples we have code along the line of:

```
{% capture initial_output_content %}

{% endcapture %}
{% include output_helper.html initial_output_content=initial_output_content %}
```

One thing I saw (and cleaned) in one of my PRs were people doing the following:

```
{% capture initial_output_content %}
{% endcapture %}
{% include output_helper.html initial_output_content=initial_output_content %}
```

I think this was just a misunderstanding of what this code was for.

One way to clean this up would be to make a custom tag and the output would be almost identical:

```
{% samplelogoutput %}

{% endsamplelogoutput %}
```

and

```
{% samplelogoutput %}{% endsamplelogoutput %}
```

It's a minor thing but just wanted to see if this is worth it not.