Use expr_raw_pk_h for Terminal::RawPkH

Earlier, we only implemented `expr_raw_pkh` which was used as shortcut
for c:expr_raw_pk_h. Note the inclusion of additional _

src/miniscript/astelem.rs

@@ -253,7 +253,7 @@ impl<Pk: MiniscriptKey, Ctx: ScriptContext> fmt::Debug for Terminal<Pk, Ctx> {
             match *self {
                 Terminal::PkK(ref pk) => write!(f, "pk_k({:?})", pk),
                 Terminal::PkH(ref pk) => write!(f, "pk_h({:?})", pk),
-                Terminal::RawPkH(ref pkh) => write!(f, "pk_h({:?})", pkh),
+                Terminal::RawPkH(ref pkh) => write!(f, "expr_raw_pk_h({:?})", pkh),
                 Terminal::After(t) => write!(f, "after({})", t),
                 Terminal::Older(t) => write!(f, "older({})", t),
                 Terminal::Sha256(ref h) => write!(f, "sha256({})", h),
@@ -307,7 +307,7 @@ impl<Pk: MiniscriptKey, Ctx: ScriptContext> fmt::Display for Terminal<Pk, Ctx> {
         match *self {
             Terminal::PkK(ref pk) => write!(f, "pk_k({})", pk),
             Terminal::PkH(ref pk) => write!(f, "pk_h({})", pk),
-            Terminal::RawPkH(ref pkh) => write!(f, "pk_h({})", pkh),
+            Terminal::RawPkH(ref pkh) => write!(f, "expr_raw_pk_h({})", pkh),
             Terminal::After(t) => write!(f, "after({})", t),
             Terminal::Older(t) => write!(f, "older({})", t),
             Terminal::Sha256(ref h) => write!(f, "sha256({})", h),