Mention Blob.subbuf can also take a Range

doc/Type/Blob.pod

@@ -64,16 +64,25 @@ Applies an encoding to turn the blob into a L<Str|/type/Str>.
 Defined as:
 
     method subbuf(Int $from, Int $len = self.elems) returns Blob:D
+    method subbuf(Range $range) returns Blob:D
 
 Usage:
 
     BLOB.subbuf(FROM, LENGTH?)
+    BLOB.subbuf(RANGE)
 
 Extracts a part of the invocant buffer, starting from the index with
 elements C<$from>, and taking C<$len> elements (or less if the buffer is
 shorter), and creates a new buffer as the result.
 
     say Blob.new(1..10).subbuf(2, 4);    # Blob:0x<03 04 05 06>
+    say Blob.new(1..10).subbuf(*-2);     # Blob:0x<09 0a>
+    say Blob.new(1..10).subbuf(*-5,2);   # Blob:0x<06 07>
+
+For convenience, also allows a C<Range> to be specified to indicate which
+part of the invocant buffer you would like:
+
+    say Blob.new(1..10).subbuf(2..5);    # Blob:0x<03 04 05 06>
 
 =head2 method unpack