Correct some small errors in tutorial examples

[bignimbus]

Addresses: #2231

And also a small issue where an <h1> tag is being included in a template where it was previously deleted.

At https://angular.io/docs/ts/latest/tutorial/toh-pt5.html:

Near the top, user sees:

Since the user has moved the <h1> tag to another template, we should not see it here, below:

Thanks in advance for your consideration of these tweaks.

[Foxandxss]

Looks good to me, but that is a big new file just for the template.

[bignimbus]

Makes sense, I can cut that down to just the essentials.

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[wardbell]

Thanks for taking this on. I appreciate the effort and your care.

I don't think we should add an entire file just to delete the <h1> . The maintenance burden is not worth it. You can see the problems already. For example, your version still has the title property which shouldn't be there. And all those irrelevant #docregion tags.

I think the world will survive an extra <h1>, especially if we tell folks to delete it.

Your other change to ToH-6 is important.

I incorporated these thoughts into #2264. Closing yours. Thanks.