Changed example refs #1739

It might be convenient also to use different examples that would cover
different use cases, not only grep and map, but other "chaining"
operators too.

Author: JJ

doc/Language/operators.pod6

@@ -2473,17 +2473,17 @@ is not required for the very last routine/method).
         .sort;              # (4) Sort, result is <Earth People>
 
     # To assign without the need of parentheses use another feed operator
-    my @result =
-        <people of earth>
+    my @result;
+    <people of earth>
         ==> map({ .tc })
         ==> grep /<[PE]>/
         ==> sort()
         ==> @result;
 
     # It can be useful to capture a partial result, however, unlike
     # the leftward feed operator, it does require parentheses or a semicolon
-    my @result =
-        <people of earth>
+    my @result; 
+    <people of earth>
         ==> map({ .tc })
         ==> my @caps; @caps   # also could wrap in parentheses instead
         ==> grep /<[PE]>/