retry educational example, fix2

.gitlab-ci.yml

@@ -11,12 +11,13 @@ test_python_numpy:
     before_script:
         - pip install numpy==1.22.4
     script:
-        - >
-          python -c
-          "
-              import numpy as np
-              A = np.random.rand(32,32)
-              B = np.linalg.inv(A)
-              C = A @ B
-              assert(np.allclose(C.diagonal(), np.ones(32)))
-          "
+        - |
+            python <<EOF
+                import numpy as np
+                n = 32
+                A = np.random.rand(n,n)
+                B = np.linalg.inv(A)
+                C = A @ B
+                assert(np.allclose(C.diagonal(), np.ones(n)))
+            EOF
+