Fix a syntax error in test spec for BLI_delaunay_2d_test.

Test specs are read from strings, and there was a comma instead
of a decimal point, and then an extra decimal point in the Quad0 test.
This test has been flaky on Windows buildbot. Perhaps this is why.

tests/gtests/blenlib/BLI_delaunay_2d_test.cc

@@ -489,7 +489,7 @@ TEST(delaunay, Quad0)
   int e_diag_out;
   const char *spec = R"(4 0 0
   0.0 1.0
-  1,0. 0.0
+  1.0 0.0
   2.0 0.1
   2.25 0.5
   )";