[gtkmm] Demos: Remove obsolete text from the TextView demo

[Kjell Ahlstedt <kjellahl src gnome org>]

commit abe28c604331b462b5e8bf9e58f79852babd1fc5
Author: Kjell Ahlstedt <kjell ahlstedt bredband net>
Date:   Thu Jan 12 16:47:59 2017 +0100

    Demos: Remove obsolete text from the TextView demo

 demos/gtk-demo/example_textview.cc |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/demos/gtk-demo/example_textview.cc b/demos/gtk-demo/example_textview.cc
index c12719a..26f8876 100644
--- a/demos/gtk-demo/example_textview.cc
+++ b/demos/gtk-demo/example_textview.cc
@@ -353,7 +353,11 @@ void Example_TextView::insert_text(Glib::RefPtr<Gtk::TextBuffer>& refBuffer)
   refAnchor = refBuffer->create_child_anchor(iter);
   iter = refBuffer->insert(refBuffer->end(), ".\n");
 
-  refBuffer->insert(iter, "\n\nThis demo doesn't demonstrate all the GtkTextBuffer features; it leaves out, 
for example: invisible/hidden text (doesn't work in GTK 2, but planned), tab stops, application-drawn areas 
on the sides of the widget for displaying breakpoints and such...");
+  refBuffer->insert(iter,
+    "\n\nThis demo doesn't demonstrate all the Gtk::TextBuffer features; "
+    "it leaves out, for example: invisible/hidden text, tab stops, "
+    "application-drawn areas on the sides of the widget for displaying "
+    "breakpoints and such...");
 
   // Apply word_wrap tag to whole buffer
   Gtk::TextBuffer::iterator start, end;