Add failing rref case

Author: Aweptimum

tests/LinearAlgebra/Reduction/ReducedRowEchelonFormTest.php

@@ -1045,6 +1045,25 @@ public function dataProviderForRref(): array
                     [0, 0, 0, 0, 0],
                 ],
             ],
+            [
+                [
+                    [-0.99999966687087, 0, 0, 0, 0, 0],
+                    [0, -0.99999966687087, 0, 0, 0, 0.00061146285160793],
+                    [0, 0, -0.99999966687087, 0, -0.00061146285160793, 0],
+                    [0, 0, 0, -1.0000003738869, 0, 0],
+                    [0, 0, -0.00061146285160793, 0, -3.7388694340557*10**-7, 0],
+                    [0, 0.00061146285160793, 0, 0, 0, -3.7388694340557*10**-7]
+                ],
+                [
+                    [1, 0, 0, 0, 0, 0],
+                    [0, 1, 0, 0, 0, 0],
+                    [0, 0, 1, 0, 0, 0],
+                    [0, 0, 0, 1, 0, 0],
+                    [0, 0, 0, 0, 1, 0],
+                    [0, 0, 0, 0, 0, 1]
+                ]
+
+            ]
         ];
     }