* Merge Extract and Part to the Part expression.
Renamed "MatrixBase::extract() const" to "MatrixBase::part() const"
* Renamed static functions identity, zero, ones, random with an upper case
first letter: Identity, Zero, Ones and Random.
diff --git a/doc/snippets/MatrixBase_part.cpp b/doc/snippets/MatrixBase_part.cpp
index 29b9577..fbc55b1 100644
--- a/doc/snippets/MatrixBase_part.cpp
+++ b/doc/snippets/MatrixBase_part.cpp
@@ -1,4 +1,4 @@
-Matrix3d m = Matrix3i::zero();
+Matrix3d m = Matrix3i::Zero();
m.part<Eigen::StrictlyUpper>().setOnes();
cout << "Here is the matrix m:" << endl << m << endl;
cout << "And let us now compute m*m.adjoint() in a very optimized way" << endl