Disabled external gits

cs440-acg/ext/eigen/doc/examples/DenseBase_middleCols_int.cpp

@@ -0,0 +1,15 @@
+#include <Eigen/Core>
+#include <iostream>
+
+using namespace Eigen;
+using namespace std;
+
+int main(void)
+{
+    int const N = 5;
+    MatrixXi A(N,N);
+    A.setRandom();
+    cout << "A =\n" << A << '\n' << endl;
+    cout << "A(1..3,:) =\n" << A.middleCols(1,3) << endl;
+    return 0;
+}