Add support for text/literate-coffeescript in the browser

[sbp]

This branch allows users of the browser-ready extras/coffee-script.js file to embed Literate CoffeeScript in web pages. For example:

<script src="extras/coffee-script.js"></script>
<script type="text/literate-coffeescript">
This is a Literate CoffeeScript example.

    console.log "Success!"
</script>

This results in "Success!" being displayed in the JavaScript console.

Contributors are urged by CONTRIBUTING.md to add their own tests. There are, however, no existing tests for the browser scripts functionality except for the test wrapper itself in tests/test.html For that reason, I have not added any new tests. I have of course tested that the code works on the web.

EDIT: The original submission used text/coffeescript+literate. This was changed to text/literate-coffeescript in a later squashed commit due to a suggestion from @jashkenas.

[michaelficarra]

Eh, +1. We might as well support it if we have it. Please commit the built /lib/coffee-script/browser.js and squash.

[sbp]

Thanks, done as instructed. Force-pushed the squashed commit.

[vendethiel]

Something wrong with

coffeetypes = ['text/coffeescript', 'text/coffeescript+literate']
coffees = (s for s in scripts when s.type in coffeetypes)

?

[sbp]

No, either way would be fine by me.

I avoid array indexing for lookups out of habit, thinking of hash lookups as more efficient.

: 1 instead of : true would be fine too.

[davidchambers]

The compiler will optimize this for you:

$ coffee -bep 's.type in ["text/coffeescript", "text/coffeescript+literate"]'
var _ref;

(_ref = s.type) === "text/coffeescript" || _ref === "text/coffeescript+literate";

[jashkenas]

How about text/literate-coffeescript instead?

[sbp]

@jashkenas: text/literate-coffeescript is okay with me.

The +suffix convention started recently. RFC 4288 does caution to use it sparingly, and there could have been a case to use +markdown instead of +literate anyway.

I'll submit a new squashed commit using text/literate-coffeescript, and incorporating the hash to array suggestion, if nobody objects.

[jashkenas]

Please do.

[sbp]

Done. Tested the cake build:browser output too.