be explicit about the power of :$bar

doc/Type/Pair.pod6

@@ -17,7 +17,6 @@ There are many syntaxes for creating C<Pair>s:
     'key' => 'value'         # this...
     :key<value>              # ...means the same as this
     :key<value1 value2>      # But this is  key => <value1 value2>
-    :$foo                    # short for  foo => $foo
     :foo(127)                # short for  foo => 127
     :127foo                  # the same   foo => 127
 
@@ -26,6 +25,12 @@ Variants of this are
     :key                     # same as   key => True
     :!key                    # same as   key => False
 
+Any variable can be turned into a C<Pair> of it's name and it's value.
+
+    my $bar = 10;
+    my %h = :$bar;
+    dd %h; OUTPUT«Hash %h = {:bar(10)}␤»
+
 =head1 Methods
 
 =head2 method antipair