* update redux section

* fix output precision to 3 for the snippets

doc/QuickReference.dox

@@ -35,6 +35,7 @@ namespace Eigen {
 <a href="#" class="top">top</a>
 \section QuickRef_Types Array, matrix and vector types
 
+
 \b Recall: Eigen provides two kinds of dense objects: mathematical matrices and vectors which are both represented by the template class Matrix, and general 1D and 2D arrays represented by the template class Array:
 \code
 typedef Matrix<Scalar, RowsAtCompileTime, ColsAtCompileTime, Options> MyMatrixType;
@@ -87,7 +88,6 @@ In the rest of this document we will use the following symbols to emphasize the
 \li <a name="matrixonly"><a/>\matrixworld linear algebra matrix and vector only
 \li <a name="arrayonly"><a/>\arrayworld array objects only
 
-
 \subsection QuickRef_Basics Basic matrix manipulation
 
 <table class="tutorial_code">
@@ -371,7 +371,7 @@ Coefficient-wise operators for matrices and vectors:
 <tr><td>\code
 mat1.cwiseMin(mat2)
 mat1.cwiseMax(mat2)
-mat1.cwiseAbs2()       
+mat1.cwiseAbs2()
 mat1.cwiseAbs()
 mat1.cwiseSqrt()
 mat1.cwiseProduct(mat2)