Importing JSON as Facts does not escape correctly

[petithug]

Describe the bug

When loading a JSON file that contains strings with single quote (section 1.3 of "A Guide to ERGOAI Packages"), the quote is not escaped.

To Reproduce

// The file test.json contains: {"a":"blah's"}

ergo> 'test.json'[parse2file('test.ergo')]@\json.

Yes

ergo> [test].

++Warning[GPP]: /tmp/test.ergo:4: input ended while scanning a comment/string: perhaps missing a quote character somewhere above the indicated line.

++Error[Ergo]> [test.ergo] near line(2)/char(19) `s'
unexpected operand:
',', '.', or some other operator may be missing just before the indicated location

++1 error

++compilation aborted

Expected behavior

The single quote should be escaped.