* 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_ones.cpp b/doc/snippets/MatrixBase_ones.cpp
index 2434f51..02c767c 100644
--- a/doc/snippets/MatrixBase_ones.cpp
+++ b/doc/snippets/MatrixBase_ones.cpp
@@ -1,2 +1,2 @@
-cout << Matrix2d::ones() << endl;
-cout << 6 * RowVector4i::ones() << endl;
+cout << Matrix2d::Ones() << endl;
+cout << 6 * RowVector4i::Ones() << endl;