package: remove the empty trailing whitespaces

Signed-off-by: Jerzy Grzegorek <jerzy.m.grzegorek@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/dash/Config.in

@@ -6,6 +6,6 @@ config BR2_PACKAGE_DASH
 	  DASH is a POSIX-compliant implementation of /bin/sh that aims to be
 	  as small as possible. It does this without sacrificing speed where
 	  possible. In fact, it is significantly faster than bash (the GNU
-	  Bourne-Again SHell) for most tasks. 
+	  Bourne-Again SHell) for most tasks.
 
 	  http://gondor.apana.org.au/~herbert/dash