Modify Label Doc and Examples (#1636)

* Make Label method examples clearer

Changed the example for the next method so that it's output differs from
that of the last example. With the change, the numbers 5 through 10 are
printed, which makes it more clear that the loop has iterated a total of
ten times but only reached the print statement during 6 of those.

Also, added the output to the example, as I believe that is clearer and
allows better visualization of what occurred.

* Document Redo method for Label type

Author: jstuder-gh

doc/Type/Label.pod6

@@ -35,10 +35,33 @@ Begin the next iteration of the loop associated with the label.
 
     MY-LABEL:
     for 1..10 {
-        next MY-LABEL if $_ > 5; # does 5 iteration and then 5 empty iteration
-        say $_;
+        next MY-LABEL if $_ < 5;
+        print "$_ ";
     }
 
+    # OUTPUT: «5 6 7 8 9 10 »
+
+=head2 method redo
+
+Defined as:
+
+    method redo(Label:)
+
+Repeat the same iteration of the loop associated with the label.
+
+    my $has-repeated = False;
+
+    MY-LABEL:
+    for 1..10 {
+        print "$_ ";
+        if $_ == 5 {
+            LEAVE $has-repeated = True;
+            redo MY-LABEL unless $has-repeated;
+        }
+    }
+
+    # OUTPUT: «1 2 3 4 5 5 6 7 8 9 10 »
+
 =head2 method last
 
 Defined as:
@@ -49,8 +72,10 @@ Terminate the execution of the loop associated with the label.
 
     MY-LABEL:
     for 1..10 {
-        last MY-LABEL if $_ > 5; # does only 5 iteration
-        say $_;
+        last MY-LABEL if $_ > 5;
+        print "$_ ";
     }
 
+    # OUTPUT: «1 2 3 4 5 »
+
 =end pod