diff --git a/Lib/idlelib/config-extensions.def b/Lib/idlelib/config-extensions.def
index d4905e83364..2d458d9c868 100644
--- a/Lib/idlelib/config-extensions.def
+++ b/Lib/idlelib/config-extensions.def
@@ -1,5 +1,5 @@
-# IDLE reads several config files to determine user preferences.  This 
-# file is the default config file for idle extensions settings.  
+# IDLE reads several config files to determine user preferences.  This
+# file is the default config file for idle extensions settings.
 #
 # Each extension must have at least one section, named after the extension
 # module. This section must contain an 'enable' item (=1 to enable the
diff --git a/Lib/idlelib/config-highlight.def b/Lib/idlelib/config-highlight.def
index 2b7deab3825..b4991c6c607 100644
--- a/Lib/idlelib/config-highlight.def
+++ b/Lib/idlelib/config-highlight.def
@@ -1,5 +1,5 @@
-# IDLE reads several config files to determine user preferences.  This 
-# file is the default config file for idle highlight theme settings.  
+# IDLE reads several config files to determine user preferences.  This
+# file is the default config file for idle highlight theme settings.
 
 [IDLE Classic]
 normal-foreground= #000000
@@ -20,7 +20,7 @@ hit-foreground= #ffffff
 hit-background= #000000
 error-foreground= #000000
 error-background= #ff7777
-#cursor (only foreground can be set) 
+#cursor (only foreground can be set)
 cursor-foreground= black
 #shell window
 stdout-foreground= blue
@@ -49,7 +49,7 @@ hit-foreground= #ffffff
 hit-background= #000000
 error-foreground= #000000
 error-background= #ff7777
-#cursor (only foreground can be set) 
+#cursor (only foreground can be set)
 cursor-foreground= black
 #shell window
 stdout-foreground= blue
diff --git a/Lib/idlelib/config-keys.def b/Lib/idlelib/config-keys.def
index 4f2be59f8aa..ceb424fe567 100644
--- a/Lib/idlelib/config-keys.def
+++ b/Lib/idlelib/config-keys.def
@@ -1,5 +1,5 @@
-# IDLE reads several config files to determine user preferences.  This 
-# file is the default config file for idle key binding settings.  
+# IDLE reads several config files to determine user preferences.  This
+# file is the default config file for idle key binding settings.
 # Where multiple keys are specified for an action: if they are separated
 # by a space (eg. action=<key1> <key2>) then the keys are altenatives, if
 # there is no space (eg. action=<key1><key2>) then the keys comprise a
@@ -18,7 +18,7 @@ close-window=<Alt-Key-F4> <Meta-Key-F4>
 do-nothing=<Control-Key-F12>
 end-of-file=<Control-Key-d>
 python-docs=<Key-F1>
-python-context-help=<Shift-Key-F1> 
+python-context-help=<Shift-Key-F1>
 history-next=<Alt-Key-n> <Meta-Key-n>
 history-previous=<Alt-Key-p> <Meta-Key-p>
 interrupt-execution=<Control-Key-c>
@@ -77,8 +77,8 @@ open-new-window=<Control-Key-x><Control-Key-n>
 open-window-from-file=<Control-Key-x><Control-Key-f>
 plain-newline-and-indent=<Control-Key-j>
 print-window=<Control-x><Control-Key-p>
-python-docs=<Control-Key-h> 
-python-context-help=<Control-Shift-Key-h> 
+python-docs=<Control-Key-h>
+python-context-help=<Control-Shift-Key-h>
 redo=<Alt-Key-z> <Meta-Key-z>
 remove-selection=<Key-Escape>
 save-copy-of-window-as-file=<Control-Key-x><Control-Key-y>
@@ -116,7 +116,7 @@ close-window=<Command-Key-w>
 do-nothing=<Control-Key-F12>
 end-of-file=<Control-Key-d>
 python-docs=<Key-F1>
-python-context-help=<Shift-Key-F1> 
+python-context-help=<Shift-Key-F1>
 history-next=<Control-Key-n>
 history-previous=<Control-Key-p>
 interrupt-execution=<Control-Key-c>
@@ -128,7 +128,7 @@ open-new-window=<Command-Key-n>
 open-window-from-file=<Command-Key-o>
 plain-newline-and-indent=<Control-Key-j>
 print-window=<Command-Key-p>
-redo=<Shift-Command-Key-z> 
+redo=<Shift-Command-Key-z>
 remove-selection=<Key-Escape>
 save-window-as-file=<Shift-Command-Key-s>
 save-window=<Command-Key-s>
diff --git a/Lib/idlelib/config-main.def b/Lib/idlelib/config-main.def
index a6388d10323..c0110480aba 100644
--- a/Lib/idlelib/config-main.def
+++ b/Lib/idlelib/config-main.def
@@ -1,6 +1,6 @@
-# IDLE reads several config files to determine user preferences.  This 
+# IDLE reads several config files to determine user preferences.  This
 # file is the default config file for general idle settings.
-#  
+#
 # When IDLE starts, it will look in
 # the following two sets of files, in order:
 #
@@ -19,17 +19,17 @@
 #     ~/.idlerc/idle-keys.cfg            the user keybinding config file
 #
 # Any options the user saves through the config dialog will be saved to
-# the relevant user config file. Reverting any general setting to the 
-# default causes that entry to be wiped from the user file and re-read 
+# the relevant user config file. Reverting any general setting to the
+# default causes that entry to be wiped from the user file and re-read
 # from the default file. User highlighting themes or keybinding sets are
 # retained unless specifically deleted within the config dialog. Choosing
-# one of the default themes or keysets just applies the relevant settings 
-# from the default file. 
+# one of the default themes or keysets just applies the relevant settings
+# from the default file.
 #
 # Additional help sources are listed in the [HelpFiles] section and must be
 # viewable by a web browser (or the Windows Help viewer in the case of .chm
-# files). These sources will be listed on the Help menu.  The pattern is 
-# <sequence_number = menu item;/path/to/help/source> 
+# files). These sources will be listed on the Help menu.  The pattern is
+# <sequence_number = menu item;/path/to/help/source>
 # You can't use a semi-colon in a menu item or path.  The path will be platform
 # specific because of path separators, drive specs etc.
 #
@@ -56,11 +56,11 @@ use-spaces= 1
 num-spaces= 4
 
 [Theme]
-default= 1  
+default= 1
 name= IDLE Classic
 
 [Keys]
-default= 1  
+default= 1
 name= IDLE Classic Windows
 
 [HelpFiles]