4 files changed, 8 insertions, 8 deletions
diff --git a/ext/tk/lib/tkextlib/vu/bargraph.rb b/ext/tk/lib/tkextlib/vu/bargraph.rb
index 27ff3c7cd0..1bcafc2887 100644
--- a/ext/tk/lib/tkextlib/vu/bargraph.rb
+++ b/ext/tk/lib/tkextlib/vu/bargraph.rb
@@ -30,10 +30,10 @@ class Tk::Vu::Bargraph < TkWindow
 
   def __strval_optkeys
     super() + [
-      'title', 
-      'barbackground', 'barcolor', 'barcolour', 
-      'tickcolor', 'tickcolour', 
-      'textcolor', 'textcolour', 
+      'title',
+      'barbackground', 'barcolor', 'barcolour',
+      'tickcolor', 'tickcolour',
+      'textcolor', 'textcolour',
     ]
   end
   private :__strval_optkeys
diff --git a/ext/tk/lib/tkextlib/vu/charts.rb b/ext/tk/lib/tkextlib/vu/charts.rb
index ee4298fa1c..8569ac5541 100644
--- a/ext/tk/lib/tkextlib/vu/charts.rb
+++ b/ext/tk/lib/tkextlib/vu/charts.rb
@@ -18,7 +18,7 @@ module Tk
       private :__item_boolval_optkeys
 
       def __item_strval_optkeys(id)
-        super(id) << 'bar' << 'color' << 'outline' << 
+        super(id) << 'bar' << 'color' << 'outline' <<
           'fill' << 'scaleline' << 'stripline'
       end
       private :__item_strval_optkeys
diff --git a/ext/tk/lib/tkextlib/vu/setup.rb b/ext/tk/lib/tkextlib/vu/setup.rb
index ce0f0bd4d4..ee406c6ca0 100644
--- a/ext/tk/lib/tkextlib/vu/setup.rb
+++ b/ext/tk/lib/tkextlib/vu/setup.rb
@@ -2,7 +2,7 @@
 #  setup.rb   --   setup script before calling TkPackage.require()
 #
 #    If you need some setup operations (for example, add a library path
-#    to the library search path) before using Tcl/Tk library packages 
-#    wrapped by Ruby scripts in this directory, please write the setup 
+#    to the library search path) before using Tcl/Tk library packages
+#    wrapped by Ruby scripts in this directory, please write the setup
 #    operations in this file.
 #
diff --git a/ext/tk/lib/tkextlib/vu/spinbox.rb b/ext/tk/lib/tkextlib/vu/spinbox.rb
index a7e40ea319..7d6104f4d1 100644
--- a/ext/tk/lib/tkextlib/vu/spinbox.rb
+++ b/ext/tk/lib/tkextlib/vu/spinbox.rb
@@ -7,7 +7,7 @@
 #
 require 'tk'
 
-if (Tk::TK_MAJOR_VERSION < 8 || 
+if (Tk::TK_MAJOR_VERSION < 8 ||
     (Tk::TK_MAJOR_VERSION == 8 && Tk::TK_MINOR_VERSION < 4))
   # call setup script  --  <libdir>/tkextlib/vu.rb
   require 'tkextlib/vu.rb'