minor ambiguities in JSON encoding steps

[sheppard]

We're working on implementing this spec in Python (see encode/django-rest-framework#2148 and encode/django-rest-framework#2682).

Overall I found everything to be very straightforward and well-documented, though I did come across a few minor misspellings and ambiguities in the steps to set a JSON encoding value:

• 8.1.1/8.1.2: Does "return it" refer to the context or to the newly created array/object? (The implementation suggests that "it" refers to the new object, but it would be helpful if this was more explicit)
• 8.3: rub -> run
• 8.3.3: The "Otherwise" seems out of place - it appears this action should always happen whenever step 8.3 is reached. (At first I thought 8.3.3 was an "else" for the "if item is not undefined then..." clause in 8.3.2)

Another minor spelling question is in Example 4 - should "hearbeat" be "heartbeat"?