document sequence operator variants ^... and ^...^ ref #3360

while here add output to an example for this operator

doc/Language/operators.pod6

@@ -65,7 +65,7 @@ assigned to that level (column labeled C<A>), and some exemplary operators
     R | Item assignment  |   = => \+= -= **= xx=
     L | Loose unary      |   so not
     X | Comma operator   |   , :
-    X | List infix       |   Z minmax X X~ X* Xeqv ... … ...^ …^
+    X | List infix       |   Z minmax X X~ X* Xeqv ... … ...^ …^ ^... ^… ^...^ ^…^
     R | List prefix      |   print push say die map substr ... [\+] [*] any Z=
     X | Loose and        |   and andthen notandthen
     X | Loose or         |   or xor orelse
@@ -3089,15 +3089,22 @@ lists are replaced by the value from applying the operator to the list:
     # produces (1a9 1b9 1c9 2a9 2b9 2c9 3a9 3b9 3c9)
 
 =head2 infix C«...»
-X<|...,operators>X<|...^,operators>X<|…,operators>X<|…^,operators>
+X<|...,operators>X<|...^,operators>X<|^...,operators>X<|^...^,operators>
+X<|…,operators>X<|…^,operators>X<|^…,operators>X<|^…^,operators>
 X<|lazy list,…>
 
     multi sub infix:<...>(**@) is assoc<list>
     multi sub infix:<...^>(**@) is assoc<list>
+    multi sub infix:<^...>(**@) is assoc<list>
+    multi sub infix:<^...^>(**@) is assoc<list>
 
 The X<sequence operator>, which can be written either as C<...> or as
-C<…> (with variants C<...^> and C<…^>) will produce (possibly lazy)
-generic sequences on demand.
+C<…> (with variants C<...^>, C<^...>, C<^...^>, C<…^>, C<^…> and C<^…^>)
+will produce (possibly lazy) generic sequences on demand.
+
+Note: the sequence operator variants C<^...>, C<^...^>, C<^…> and
+C<^…^> have been available in Rakudo compiler starting from 2020.05
+release.
 
 The left-hand side will always include the initial elements; it may include a
 generator too (after the first element or elements). The right-hand side will
@@ -3148,11 +3155,12 @@ knows about arithmetic and geometric sequences.
 If the endpoint is not C<*>, it's smartmatched against each generated
 element and the sequence is terminated when the smartmatch succeeded.
 For the C<...> operator, the final element is included, for the C<...^>
-operator it's excluded.
+and the C<^...^> operators it's excluded.
 
 This allows you to write
 
     say 1, 1, * + * ...^ *>= 100;
+    # OUTPUT: «(1 1 2 3 5 8 13 21 34 55 89)␤»
 
 to generate all Fibonacci numbers up to but excluding 100.
 
@@ -3163,6 +3171,11 @@ well, so they are also checked against the endpoint:
     say 1, 2, 4, 8, 16 ... $end;
     # OUTPUT: «(1 2 4)␤»
 
+The C<^...> and C<^...^> operators excludes the initial element.
+
+    say 1, 2, 4 ^... 128;  # OUTPUT: «(2 4 8 16 32 64 128)␤»
+    say 1, 2, 4 ^...^ 128; # OUTPUT: «(2 4 8 16 32 64)␤»
+
 =head1 List prefix precedence
 
 X<|list =>