fix(geometry): is_clockwise() now works as expected for a disv problem

[emorway-usgs]

No description provided.

[codecov]

Codecov Report

Merging #1374 (d90750e) into develop (8ae9b4d) will decrease coverage by 44.731%.
The diff coverage is 0.000%.

@@              Coverage Diff               @@
##           develop     #1374        +/-   ##
==============================================
- Coverage   74.800%   30.068%   -44.732%     
==============================================
  Files          249       249                
  Lines        53568     52148      -1420     
==============================================
- Hits         40069     15680     -24389     
- Misses       13499     36468     +22969     

Impacted Files	Coverage Δ
flopy/utils/geometry.py	24.937% <0.000%> (-50.375%)	⬇️
flopy/mf6/utils/testutils.py	0.000% <0.000%> (-93.334%)	⬇️
flopy/mfusg/mfusgsms.py	6.161% <0.000%> (-91.514%)	⬇️
flopy/mf6/utils/postprocessing.py	9.259% <0.000%> (-88.889%)	⬇️
flopy/modflow/mfevt.py	7.812% <0.000%> (-87.007%)	⬇️
flopy/mf6/utils/lakpak_utils.py	2.097% <0.000%> (-85.315%)	⬇️
flopy/modflow/mfhyd.py	13.223% <0.000%> (-85.124%)	⬇️
flopy/utils/swroutputfile.py	10.714% <0.000%> (-85.079%)	⬇️
flopy/utils/mtlistfile.py	4.620% <0.000%> (-84.700%)	⬇️
flopy/modflowlgr/mflgr.py	6.271% <0.000%> (-84.354%)	⬇️
... and 205 more

[jlarsen-usgs]

Changes look good. Automatic polygon closure was appending the incorrect vertex prior to this PR.

[christianlangevin]

test?

[christianlangevin]

In the future it would make more sense to add this test of a small function to an existing autotest script (such as t032_test.py which uses flopy.utils.geometry) instead of creating a new source file to test this small function.

[emorway-usgs]

I would be happy to move this new test over to t032 if helpful? I was not aware other flopy.util.geometry() tests were being collected there.