Fix issues 296 and 639 #694
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This set of changes covers all triangulation errors in issue 693. A point coincident with a triangle vertex is OK and needed for bridges, but sometimes the middle point has edges cutting through the triangle that make it a non-ear. We fix that and a couple of off-by-one error (that fixes one of the test cases).
We need to recognize two consecutive bridges as a non-ear.
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Sep 8, 2020
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The commits for each are separate. For 639 we resolve all test cases.