doc: Fix unbalanced parentheses in documentation. * errors.txi, install.txi, sparse.txi, vectorize.txi: Fix unbalanced parentheses. * data.cc (Fall, Feye): Fix unbalanced parentheses. * rand.cc (Frandn, Frande): Fix unbalanced parentheses. * amd.cc (Famd): Fix unbalanced parentheses. * ccolamd.cc (Fccolamd): Fix unbalanced parentheses. * DASPK-opts.in: Fix unbalanced parentheses. * cplxpair.m, javamem.m, glpk.m, area.m, peaks.m, hgload.m, hotelling_test_2.m, hgsave.m: Fix unbalanced parentheses.

#include <iostream>
#include <octave/oct.h>

int
main (void)
{
  std::cout << "Hello Octave world!\n";

  int n = 2;
  Matrix a_matrix = Matrix (n, n);

  for (octave_idx_type i = 0; i < n; i++)
    for (octave_idx_type j = 0; j < n; j++)
      a_matrix(i,j) = (i + 1) * 10 + (j + 1);

  std::cout << a_matrix;

  return 0;
}