[gnome-builder] help: update headerbar docs

[Christian Hergert <chergert src gnome org>]

commit 752b722c19218eeb0ba2bf3a95f732e70583f2a0
Author: Christian Hergert <chergert redhat com>
Date:   Tue Mar 12 15:49:03 2019 -0700

    help: update headerbar docs

 doc/help/plugins/workbench/headerbar.rst | 30 ++++++++++++++++++------------
 1 file changed, 18 insertions(+), 12 deletions(-)
---
diff --git a/doc/help/plugins/workbench/headerbar.rst b/doc/help/plugins/workbench/headerbar.rst
index 94e34ca48..1d355fcc6 100644
--- a/doc/help/plugins/workbench/headerbar.rst
+++ b/doc/help/plugins/workbench/headerbar.rst
@@ -1,31 +1,37 @@
 Adding Widgets to the Header Bar
 ================================
 
-You might want to add a button to the workbench header bar.
-To do this, use an ``Ide.WorkbenchAddin`` and fetch the header bar using ``Ide.Workbench.get_headerbar()``.
+You might want to add a button to the workspace header bar.
+To do this, use an ``Ide.WorkspaceAddin`` and fetch the header bar using ``Ide.Workspace.get_headerbar()``.
 You can attach your widget to either the left or the right side of the ``Ide.OmniBar`` in the center of the 
header bar.
-Additionally, by specifying a ``Gtk.PackType``, you can align the button within the left or right of the 
header bar.
 
-We suggest using ``Gio.SimpleAction`` to attach an action to the workbench and then activating the action 
using the ``Gtk.Button:action-name`` property.
+We suggest using ``Gio.SimpleAction`` to attach an action to the workspace and then activating the action 
using the ``Gtk.Button:action-name`` property.
 
 .. code-block:: python3
-   :caption: Adding a button to the workbench header bar
+   :caption: Adding a button to the workspace header bar
 
    import gi
 
-   from gi.repository import GObject
-   from gi.repository import Ide
+   from gi.repository import GObject, Ide
 
-   class MyWorkbenchAddin(GObject.Object, Ide.WorkbenchAddin):
+   class MyWorkspaceAddin(GObject.Object, Ide.WorkspaceAddin):
 
-       def do_load(self, workbench):
-           headerbar = workbench.get_headerbar()
+       def do_load(self, workspace):
+           headerbar = workspace.get_headerbar()
 
            # Add button to top-center-left
            self.button = Gtk.Button(label='Click', action_name='win.hello', visible=True)
-           headerbar.insert_left(self.button, Gtk.PackType.PACK_END, 0)
+           headerbar.add_center_left(self.button)
 
-       def do_unload(self, workbench):
+           # Add button to left
+           self.button = Gtk.Button(label='Click', action_name='win.hello', visible=True)
+           headerbar.add_primary(self.button)
+
+           # Add button to right
+           self.button = Gtk.Button(label='Click', action_name='win.hello', visible=True)
+           headerbar.add_secondary(self.button)
+
+       def do_unload(self, workspace):
            # remove the button we added
            self.button.destroy()
            self.button = None