Squashed 'third_party/eigen/' changes from 61d72f6..cf794d3


Change-Id: I9b814151b01f49af6337a8605d0c42a3a1ed4c72
git-subtree-dir: third_party/eigen
git-subtree-split: cf794d3b741a6278df169e58461f8529f43bce5d
diff --git a/doc/snippets/EigenSolver_eigenvectors.cpp b/doc/snippets/EigenSolver_eigenvectors.cpp
index 0fad4da..8355f76 100644
--- a/doc/snippets/EigenSolver_eigenvectors.cpp
+++ b/doc/snippets/EigenSolver_eigenvectors.cpp
@@ -1,4 +1,4 @@
 MatrixXd ones = MatrixXd::Ones(3,3);
 EigenSolver<MatrixXd> es(ones);
-cout << "The first eigenvector of the 3x3 matrix of ones is:" 
-     << endl << es.eigenvectors().col(1) << endl;
+cout << "The first eigenvector of the 3x3 matrix of ones is:"
+     << endl << es.eigenvectors().col(0) << endl;