Added docs for Blob.reverse

Author: Jan-Olof Hendig

doc/Type/Blob.pod6

@@ -157,4 +157,16 @@ The template string consists of zero or more units that begin with an ASCII
 letter, and are optionally followed by a quantifier.  For details, see
 L<unpack|/routine/unpack>.
 
+=head2 method reverse
+
+Defined as:
+
+    method reverse(Blob:D: --> Blob:D)
+
+Returns a Blob with all elements in reversed order.
+
+    say Blob.new([1, 2, 3]).reverse;    # OUTPUT: «Blob:0x<03 02 01>␤»
+    say blob16.new([2]).reverse;        # OUTPUT: «Blob[uint16]:0x<02>␤»
+    say buf32.new([16, 32]).reverse;    # OUTPUT: «Buf[uint32]:0x<20 10>␤»
+
 =end pod