Bad JSON near originGeometry key

[tpett]

Description

The JSON output option for the convert command produces invalid JSON in certain circumstances (according to RFC 7159) and causes errors when trying to parse it.

Steps to Reproduce

Using an image that has a page origin that is not (0, 0) the originGeometry line will have the format originGeometry: +123+123, which is invalid. The data should be wrapped in quotation marks. See line 1452 of json.c

$ convert inputFile.jpg json:

System Configuration

I've seen this in Linux and OS X on recent versions of v7.