Fix GeneralizedEigenSolver::eigenvectors() not appearing in documentation

Eigen/src/Eigenvalues/GeneralizedEigenSolver.h

diff --git a/Eigen/src/Eigenvalues/GeneralizedEigenSolver.h b/Eigen/src/Eigenvalues/GeneralizedEigenSolver.h
index ca15e6d..b114cfa 100644
--- a/Eigen/src/Eigenvalues/GeneralizedEigenSolver.h
+++ b/Eigen/src/Eigenvalues/GeneralizedEigenSolver.h
@@ -161,7 +161,7 @@
     compute(A, B, computeEigenvectors);
   }
 
-  /* \brief Returns the computed generalized eigenvectors.
+  /** \brief Returns the computed generalized eigenvectors.
    *
    * \returns  %Matrix whose columns are the (possibly complex) right eigenvectors.
    * i.e. the eigenvectors that solve (A - l*B)x = 0. The ordering matches the eigenvalues.