Run cargo +nightly fmt

No manual changes.

bitcoin/src/pow.rs

@@ -358,7 +358,7 @@ impl CompactTarget {
 mod tmp {
     use super::*;
 
-impl CompactTarget {
+    impl CompactTarget {
         /// Creates a `CompactTarget` from a prefixed hex string.
         pub fn from_hex(s: &str) -> Result<Self, PrefixedHexError> {
             let target = parse::hex_u32_prefixed(s)?;
@@ -446,7 +446,7 @@ impl CompactTarget {
             let bits = current.bits;
             CompactTarget::from_next_work_required(bits, timespan.into(), params)
         }
-}
+    }
 }
 
 impl From<CompactTarget> for Target {