message: shorten binding name for block_signature
diff: @@ -82,11 +82,7 @@ fn fmt_pretty(
  Val::Hash(hash) => write!(f, "{}", Colour::Green.paint(hex::encode(hash.as_ref()))),
  Val::Epoch(epoch) => write!(f, "{}", Colour::Blue.paint(format!("{}", epoch))),
  Val::SlotId(slotid) => write!(f, "{}", Colour::Purple.paint(format!("{}", slotid))),
  - Val::BlockSig(block_signature) => write!(
  - f,
  - "{}",
  - Colour::Cyan.paint(format!("{:?}", block_signature))
  - ),
  + Val::BlockSig(blksig) => write!(f, "{}", Colour::Cyan.paint(format!("{:?}", blksig))),
  // format pretty-val as a set of key-vals
  Val::Tree(ast) => {
  