message: Small correction in a comment
diff: // problem corresponding to the second order definite Maxwell
  // equation curl curl E + sigma E = f with boundary condition
  // E x n = <given tangential field>. In this example sigma is an
  -// anisotropic 2x2 tensor. Here, we use a given exact
  +// anisotropic 3x3 tensor. Here, we use a given exact
  // solution E and compute the corresponding r.h.s. f.
  // We discretize with Nedelec finite elements in 1D, 2D, or 3D.
  //
  