[gtkmm-documentation] Indenting correction.

[Murray Cumming <murrayc src gnome org>]

commit b52df6cf2cb638475511ae9b6b3b5346fcf7a22c
Author: Murray Cumming <murrayc murrayc com>
Date:   Wed Jan 19 09:21:21 2011 +0100

    Indenting correction.

 examples/book/base/base.cc |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/examples/book/base/base.cc b/examples/book/base/base.cc
index fe50770..bc70383 100644
--- a/examples/book/base/base.cc
+++ b/examples/book/base/base.cc
@@ -2,11 +2,11 @@
 
 int main(int argc, char *argv[])
 {
-    Gtk::Main kit(argc, argv);
+  Gtk::Main kit(argc, argv);
 
-    Gtk::Window window;
+  Gtk::Window window;
 
-    Gtk::Main::run(window);
+  Gtk::Main::run(window);
     
-    return 0;
+  return 0;
 }