Re: [bp-i18n-specdev] include table of examples in section 4.7 (#3)

I like the idea, but it was somewhat complicated. Some escaping schemes (`\u`) are used by a bunch of languages; a few of these also use `\U`. Some provide for the delimited variety. It's complicated. I did break out fixed-vs-variable and tried to clarify. I'm not sure my effort was an improvement :-)

![image](https://user-images.githubusercontent.com/69082/167649610-f21bfb85-e57c-496d-bbe6-fb38a8e90678.png)

What do you think?

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