Add options to saveJSONArray documentation (enhancement)

[jeremydouglass]

Documentation for saveJSONArray lists 'options' but doesn't say what they are.

It would be useful to add a list of common options in the documentation. A particularly useful example option would be 'compact'; it is a common need for JSON export.

Discussed in a Processing forum thread.

[benfry]

Yep—the options are "compact" and "indent=N" where you replace N with the number of spaces you'd like for indents. Moving this to the correct repo: processing/processing-docs#479

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