remove trailing whitespace

Author: coke

doc/Type/Exception.pod6

@@ -137,7 +137,7 @@ Defined as:
     method    die(Exception:D:)
 
 Throws a fatal L<Exception>. The default exception handler prints each
-element of the list to 
+element of the list to
 L«C<$*ERR>|/language/variables#index-entry-%24%2AERR» (STDERR).
 
 =for code