string content is not escaped appropriately in json output

[satra]

on a sequence i was testing the json bids output returns:

{
	"PulseSequenceDetails": "%CustomerSeq%\ep2d_diff_MGH"
}

however, the \ should be escaped \\

{
	"PulseSequenceDetails": "%CustomerSeq%\\ep2d_diff_MGH"
}

more generally the json should be validated before writing.

[satra]

here is a bit of playing with this in python:

In [31]: a = { "PulseSequenceDetails": "%CustomerSeq%\ep2d_diff_MGH"}

In [32]: a
Out[32]: {'PulseSequenceDetails': '%CustomerSeq%\\ep2d_diff_MGH'}

In [33]: print(json.loads(json.dumps(a)))
{'PulseSequenceDetails': '%CustomerSeq%\\ep2d_diff_MGH'}

In [34]: print(json.loads(json.dumps(a))['PulseSequenceDetails'])
%CustomerSeq%\ep2d_diff_MGH

[neurolabusc]

This was a recent regression that allows users to specify output folders as well as filenames (e.g. -f mydir/%p_%s, please check the latest code which restores previous behavior for json strings so that one gets "PulseSequenceDetails": "%CustomerSeq%_hcp_mbep2d_diff" instead of "PulseSequenceDetails": "%CustomerSeq%\hcp_mbep2d_diff". Note, instead of escaping special characters I replace them with an underline so string length does not change.