Improve wording for code conventions

[leobalter]

sustainable code can replace the current wording without the use of quotes, because it's probably the real intention of that phrase.

The quotes sounds like a documentation smell. Other words can be used, but might bring the discussion (bikeshedding) if that item is really necessary in that list.

• Write human-readable code
• Avoid writing unreadable code
• Write comprehensible code

Any of them are subjective. Following the other items in that list is good enough already.

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[leobalter]

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[leobalter]

friendly ping

[gaearon]

How about "Write code that is explicit"?

[leobalter]

@gaearon, it works for me as it is better than the current phrase. It still hold some issues of being slightly subjective, but I would be +1 for this change if it's accepted.

[leobalter]

a new commit is up

[bvaughn]

Thank you for filing this PR!

I'm sorry to be the bearer of bad news, but the documentation and source code for reactjs.org now lives in a different repository: reactjs/reactjs.org. (For more info on why we made this move, see issue #11075.)

Would you be willing to re-open this PR on the new repo? I promise we'll review it quickly!