Description of problem:

sadf -j outputs invalid json


Version-Release number of selected component (if applicable):

sysstat-11.1.5-1.fc23.x86_64


How reproducible:
very

Steps to Reproduce:
1. sadf -j | python -c "import json, sys; print json.load(sys.stdin)"
2.
3.

Actual results:
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib64/python2.7/json/__init__.py", line 290, in load
    **kw)
  File "/usr/lib64/python2.7/json/__init__.py", line 338, in loads
    return _default_decoder.decode(s)
  File "/usr/lib64/python2.7/json/decoder.py", line 366, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib64/python2.7/json/decoder.py", line 382, in raw_decode
    obj, end = self.scan_once(s, idx)
ValueError: Expecting , delimiter: line 17 column 12 (char 521)


Expected results:
loadable json


Additional info:

it looks like there's a comma missing before the 'fchosts' dict key?

[bowe@catbus ~]$ sadf -j | head -n 20 | tail -n 5
						{"cpu": "all", "user": 7.81, "nice": 0.09, "system": 1.77, "iowait": 0.11, "steal": 0.00, "idle": 90.22}
					]					"fchosts": [

					]
				},