Merge rust-bitcoin/rust-bitcoin#1596: Implement fmt traits for ScriptBuf

ed6f6d11dd Implement fmt traits for ScriptBuf (Tobin C. Harding)

Pull request description:

  We can improve ergonomics of the `script` module by implementing the `fmt` traits on `ScriptBuf`, trivial because we can call through to the `Script` implementations.

  Fix: #1585

ACKs for top commit:
  Kixunil:
    ACK ed6f6d11dd
  apoelstra:
    ACK ed6f6d11dd

Tree-SHA512: 878a1522af4ed1e10d1d8d60d150e6571008c008b5e5c662c67462f9e09075b4f1fe4e399ed50e98cd7253b6815937c6732cd1ce02b74a5be017d5b8fcdbbd2f

bitcoin/src/blockdata/script.rs

@@ -691,6 +691,27 @@ impl core::str::FromStr for ScriptBuf {
     }
 }
 
+impl fmt::Display for ScriptBuf {
+    #[inline]
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        fmt::Display::fmt(self.as_script(), f)
+    }
+}
+
+impl fmt::LowerHex for ScriptBuf {
+    #[inline]
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        fmt::LowerHex::fmt(self.as_script(), f)
+    }
+}
+
+impl fmt::UpperHex for ScriptBuf {
+    #[inline]
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        fmt::UpperHex::fmt(self.as_script(), f)
+    }
+}
+
 /// An object which can be used to construct a script piece by piece.
 #[derive(PartialEq, Eq, Clone)]
 pub struct Builder(ScriptBuf, Option<opcodes::All>);