Description

Fixes #5708
More specifically, addresses #5708 (comment)

With the quoteProps option set to preserve and singleQuotes to false (default), double quotes are always used for printing strings, including situations like this: "bla\"bla". This effectively allows using --parser json5 for "JSON with comments and trailing commas".

Checklist

• I’ve added tests to confirm my change works.
• (If changing the API or CLI) I’ve documented the changes I’ve made (in the docs/ directory).
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• I’ve read the contributing guidelines.

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