remove trailing whitespace

doc/Type/List.pod6

@@ -929,11 +929,11 @@ Defined as:
 
     sub zip(+@e, :&with) returns Seq:D
 
-Builds a 'list of lists', returned as a sequence, from multiple input lists or 
+Builds a 'list of lists', returned as a sequence, from multiple input lists or
 other L<iterables|/type/Iterable>.
 
 C<zip> iterates through each of the input lists synchronously, 'Zipping' them
-together, so that elements are grouped according to their input list index, in 
+together, so that elements are grouped according to their input list index, in
 the order that the lists are provided.
 
     say zip(<a b c>, <d e f>, <g h i>);
@@ -952,16 +952,16 @@ C<zip> can provide input to a for loop :
 
 , or more succinctly :
 
-    say .join(",") for zip <a b c>, <d e f>, <g h i>;  # same output  
-    
-Note, that if the input lists have an unequal number of elements, then 
-C<zip> terminates once the shortest input list is exhausted, and trailing 
+    say .join(",") for zip <a b c>, <d e f>, <g h i>;  # same output
+
+Note, that if the input lists have an unequal number of elements, then
+C<zip> terminates once the shortest input list is exhausted, and trailing
 elements from longer input lists are discarded.
 
     say <a b c> Z <d e f m n o p> Z <g h i>;
     # ((a d g) (b e h) (c f i))
 
-In cases where data clipping is possible, but undesired, then consider using 
+In cases where data clipping is possible, but undesired, then consider using
 L<roundrobin|/type/List#sub_roundrobin> instead of C<zip>.
 
 The optional C<with> parameter will additionally reduce the zipped lists. For
@@ -984,10 +984,10 @@ Defined as:
 
     method roundrobin(List:D:) returns Seq
 
-Builds a 'list of lists', returned as a sequence, from multiple input lists or 
+Builds a 'list of lists', returned as a sequence, from multiple input lists or
 other L<iterables|/type/Iterable>. C<roundrobin> returns an identical result to
-that of L<zip|/type/List#routine_zip>, except when the input lists have an 
-unequal number of elements.   
+that of L<zip|/type/List#routine_zip>, except when the input lists have an
+unequal number of elements.
 
     say roundrobin <a b c>, <d e f>, <g h i>;
     # ((a d g) (b e h) (c f i))
@@ -996,7 +996,7 @@ unequal number of elements.
     # 1,2,3
     # 2,3,4
 
-C<roundrobin> does not terminate once one or more of the input lists become 
+C<roundrobin> does not terminate once one or more of the input lists become
 exhausted, but proceeds until all elements from all lists have been processed.
 
     say roundrobin <a b c>, <d e f m n o p>, <g h i j>;
@@ -1007,10 +1007,10 @@ exhausted, but proceeds until all elements from all lists have been processed.
     # 2,3,4
     # 57,102
     # 77
-    
-Therefore no data values are lost due in the 'zipping' operation. A record of 
-which input list provided which element cannot be gleaned from the resulting 
-sequence, however. 
+
+Therefore no data values are lost due in the 'zipping' operation. A record of
+which input list provided which element cannot be gleaned from the resulting
+sequence, however.
 
 C<roundrobin> can be useful in combining messy data to the point where a manual
 post-processing step can then be undertaken.