merged branch literal/v1.8.0 (PR #723)

Commits
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d13f742 fix example in doc for embed tag
b11412e improve documentation for embed tag

Discussion
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improve documentation for embed tag

https://github.com/fabpot/Twig/issues/722

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by fabpot at 2012-05-10T05:10:37Z

I think this is a great improvement over the original version! The notion of "micro-layouts" certainly helps understand the concept behind the `embed` tag.

Thanks.