[gtkmm-documentation] Adapt to pack_end() without bool parameters.

[Murray Cumming <murrayc src gnome org>]

commit 4878874c38f5883b22e8bf9f8272f238350139e8
Author: Murray Cumming <murrayc murrayc com>
Date:   Wed May 3 10:01:49 2017 +0200

    Adapt to pack_end() without bool parameters.

 examples/book/placessidebar/examplewindow.cc       |    2 +-
 .../book/printing/advanced/printformoperation.cc   |    6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/examples/book/placessidebar/examplewindow.cc b/examples/book/placessidebar/examplewindow.cc
index c216001..cc3a154 100644
--- a/examples/book/placessidebar/examplewindow.cc
+++ b/examples/book/placessidebar/examplewindow.cc
@@ -109,7 +109,7 @@ void ExampleWindow::on_placessidebar_open_location(const Glib::RefPtr<Gio::File>
   location_information_grid.set_margin_start(6);
   location_information_grid.set_margin_end(6);
 
-  dialog.get_content_area()->pack_end(location_information_grid, true, true);
+  dialog.get_content_area()->pack_end(location_information_grid, Gtk::PackOptions::EXPAND_WIDGET);
   dialog.run();
 }
 
diff --git a/examples/book/printing/advanced/printformoperation.cc 
b/examples/book/printing/advanced/printformoperation.cc
index 72938d0..f56a220 100644
--- a/examples/book/printing/advanced/printformoperation.cc
+++ b/examples/book/printing/advanced/printformoperation.cc
@@ -158,14 +158,14 @@ Gtk::Widget* PrintFormOperation::on_create_custom_widget()
   vbox->set_margin(12);
 
   auto hbox = Gtk::manage(new Gtk::Box(Gtk::Orientation::HORIZONTAL, 8));
-  vbox->pack_start(*hbox, false, false);
+  vbox->pack_start(*hbox, Gtk::PackOptions::SHRINK);
   hbox->set_margin(6);
 
   auto label = Gtk::manage(new Gtk::Label("Choose a font: "));
-  hbox->pack_start(*label, false, false);
+  hbox->pack_start(*label, Gtk::PackOptions::SHRINK);
 
   m_FontButton.set_font_name(m_Font);
-  hbox->pack_start(m_FontButton, false, false);
+  hbox->pack_start(m_FontButton, Gtk::PackOptions::SHRINK);
 
   return vbox;
 }