Remove trailing whitespace.

Also, the script is a one-liner, stolen from [1]:

ack --print0 -l '[ \t]+$' | xargs -0 -n1 perl -pi -e 's/[ \t]+$//'

[1]
https://stackoverflow.com/questions/149057/how-to-remove-trailing-whitespace-of-all-files-recursively

WINGs/Extras/Makefile.am

@@ -5,20 +5,20 @@ AUTOMAKE_OPTIONS =
 # is this a kluge? if so, how should i do it?
 includedir = @includedir@/WINGs
 
-include_HEADERS = wtableview.h wtabledelegates.h 
+include_HEADERS = wtableview.h wtabledelegates.h
 
 
 lib_LTLIBRARIES = libExtraWINGs.la
 
 noinst_PROGRAMS = test
 
-EXTRA_DIST = 
+EXTRA_DIST =
 
 libExtraWINGs_la_SOURCES = 	\
 	wtableview.c \
 	wtabledelegates.c \
 	wtableview.h \
-	wtabledelegates.h 
+	wtabledelegates.h
 
 AM_CPPFLAGS = -I$(top_srcdir)/wrlib -I$(top_srcdir)/WINGs \
 	-DRESOURCE_PATH=\"$(datadir)/WINGs\" @HEADER_SEARCH_PATH@

WINGs/Extras/wtabledelegates.h

@@ -11,15 +11,15 @@ WMTableColumnDelegate *WTCreateStringDelegate(WMTableView *table);
 WMTableColumnDelegate *WTCreatePixmapStringDelegate(WMTableView *parent);
 
 WMTableColumnDelegate *WTCreateStringEditorDelegate(WMTableView *table);
-    
+
 WMTableColumnDelegate *WTCreateEnumSelectorDelegate(WMTableView *table);
 void WTSetEnumSelectorOptions(WMTableColumnDelegate *delegate,
                               char **options, int count);
-    
+
 WMTableColumnDelegate *WTCreateBooleanSwitchDelegate(WMTableView *parent);
-    
+
 #ifdef __cplusplus
 }
 #endif
-    
+
 #endif