maint: Clean up naming and indentation of #ifdef blocks in libgui Rename guard #ifdef names to use octave_ namespace prefix and file name. Indent #ifdef blocks. * Backend.cc, Backend.h, BaseControl.cc, BaseControl.h, ButtonControl.cc, ButtonControl.h, Canvas.cc, Canvas.h, CheckBoxControl.cc, CheckBoxControl.h, Container.cc, Container.h, ContextMenu.cc, ContextMenu.h, EditControl.cc, EditControl.h, Figure.cc, Figure.h, FigureWindow.cc, FigureWindow.h, GLCanvas.cc, GLCanvas.h, GenericEventNotify.h, KeyMap.cc, KeyMap.h, ListBoxControl.cc, ListBoxControl.h, Logger.cc, Logger.h, Menu.cc, Menu.h, MenuContainer.h, MouseModeActionGroup.cc, MouseModeActionGroup.h, Object.cc, Object.h, ObjectFactory.cc, ObjectFactory.h, ObjectProxy.cc, ObjectProxy.h, Panel.cc, Panel.h, PopupMenuControl.cc, PopupMenuControl.h, PushButtonControl.cc, PushButtonControl.h, PushTool.cc, PushTool.h, QtHandlesUtils.cc, QtHandlesUtils.h, RadioButtonControl.cc, RadioButtonControl.h, SliderControl.cc, SliderControl.h, TextControl.cc, TextControl.h, TextEdit.cc, TextEdit.h, ToggleButtonControl.cc, ToggleButtonControl.h, ToggleTool.cc, ToggleTool.h, ToolBar.cc, ToolBar.h, ToolBarButton.cc, ToolBarButton.h, __init_qt__.cc, __init_qt__.h, annotation-dialog.cc, annotation-dialog.h, gl-select.cc, gl-select.h, color-picker.cc, color-picker.h, dialog.cc, documentation-dock-widget.cc, documentation-dock-widget.h, files-dock-widget.cc, files-dock-widget.h, find-files-dialog.cc, find-files-dialog.h, find-files-model.cc, find-files-model.h, history-dock-widget.cc, history-dock-widget.h, file-editor-interface.h, file-editor-tab.cc, file-editor-tab.h, file-editor.cc, file-editor.h, find-dialog.cc, find-dialog.h, octave-qscintilla.cc, octave-txt-lexer.cc, main-window.cc, octave-cmd.cc, octave-dock-widget.cc, octave-gui.cc, octave-interpreter.cc, octave-interpreter.h, octave-qt-link.cc, octave-qt-link.h, parser.cc, webinfo.cc, resource-manager.cc, resource-manager.h, settings-dialog.cc, settings-dialog.h, shortcut-manager.cc, shortcut-manager.h, terminal-dock-widget.cc, terminal-dock-widget.h, thread-manager.cc, welcome-wizard.cc, welcome-wizard.h, workspace-model.cc, workspace-view.cc: Clean up naming and indentation of #ifdef blocks in libgui.

--- a/libgui/src/thread-manager.cc	Sat Feb 06 06:40:13 2016 -0800
+++ b/libgui/src/thread-manager.cc	Sat Feb 06 07:32:37 2016 -0800
@@ -21,13 +21,13 @@
 */
 
 #ifdef HAVE_CONFIG_H
-#include <config.h>
+#  include <config.h>
 #endif
 
 #if defined (__WIN32__) && ! defined (__CYGWIN__)
-#include <windows.h>
+#  include <windows.h>
 #else
-#include <pthread.h>
+#  include <pthread.h>
 #endif
 
 #include <sys/types.h>
@@ -90,13 +90,13 @@
 // The following is a workaround for an apparent bug in GCC 4.1.2 and
 // possibly earlier versions.  See Octave bug report #30685 for details.
 #if defined (__GNUC__)
-# if ! (__GNUC__ > 4 \
-        || (__GNUC__ == 4 && (__GNUC_MINOR__ > 1 \
-                              || (__GNUC_MINOR__ == 1 && __GNUC_PATCHLEVEL__ > 2))))
-#  undef GNULIB_NAMESPACE
-#  define GNULIB_NAMESPACE
-#  warning "disabling GNULIB_NAMESPACE for signal functions -- consider upgrading to a current version of GCC"
-# endif
+#  if ! (__GNUC__ > 4 \
+         || (__GNUC__ == 4 && (__GNUC_MINOR__ > 1 \
+                               || (__GNUC_MINOR__ == 1 && __GNUC_PATCHLEVEL__ > 2))))
+#    undef GNULIB_NAMESPACE
+#    define GNULIB_NAMESPACE
+#    warning "disabling GNULIB_NAMESPACE for signal functions -- consider upgrading to a current version of GCC"
+#  endif
 #endif
 
 static void