wkt_to_geojson not working when booth coordinates are negatives?

[ZDidier]

OK

wkt = 'POLYGON ((30 10, 40 40, 20 40, 10 20, 30 10))'
print(convert.wkt_to_geojson(wkt))

OK

wkt = 'POLYGON ((30.5 10.3, -40.5 40.1, 20.5 40.3, 10.5 20.6, 30.5 10.3))'
print(convert.wkt_to_geojson(wkt))

KO

wkt = 'POLYGON ((30.5 10.3, -40.5 -40.1, 20.5 40.3, 10.5 20.6, 30.5 10.3))'
print(convert.wkt_to_geojson(wkt))
ValueError: POLYGON ((30.5 10.3, -40.5 -40.1, 20.5 40.3, 10.5 20.6, 30.5 10.3)) is not a WKT string

[i21510]

In fact, it doesn't seem to work with negatives coordinates at all

[probinso]

I suspect that this is a continuation of this issue. I'll just add my failing example.

wkt = 'POLYGON ((-153.7637604628186 70.64158670328457, -152.7804213168429 69.57675927338664, -143.5388203961125 70.28750982071695, -144.0363194550571 71.37897101025709, -153.7637604628186 70.64158670328457))'
convert.wkt_to_geojson(wkt)

{
    'exception': 'ValueError',
    'exceptionMessage': 'POLYGON ((-153.7637604628186 70.64158670328457, -152.7804213168429 69.57675927338664, -143.5388203961125 70.28750982071695, -144.0363194550571 71.37897101025709, -153.7637604628186 70.64158670328457)) is not a WKT string'
}

[simonprickett]

I'm also seeing the same issue when working with real world coords:

raise ValueError('{} is not a WKT string'.format(wkt))
ValueError: POLYGON ((-6.328125 55.24155203565252,-5.888671875 55.32914440840507,-5.592041015625 55.29162848682989,-5.47119140625 55.70235509327093,...