Merge rust-bitcoin#4647: fix: typo in error message

c642beb fix typo in error message (Afounso Souza)

Pull request description:

  The error message contains "do you have an hardened child number" but should be "do you have a hardened child number"


ACKs for top commit:
  tcharding:
    ACK c642beb
  apoelstra:
    ACK c642beb; successfully ran local tests


Tree-SHA512: f8922d00a7bb687284387f880a1beeba6b1037d1885ea24c8162361880b250e6b44767c076ab40c6cd3cb9c667d28147413cc8257c46cd1383cc999c06735321

Author: apoelstra

bitcoin/src/bip32.rs

@@ -672,7 +672,7 @@ impl From<Infallible> for IndexOutOfRangeError {
 
 impl fmt::Display for IndexOutOfRangeError {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "index {} out of range [0, 2^31 - 1] (do you have an hardened child number, rather than an index?)", self.index)
+        write!(f, "index {} out of range [0, 2^31 - 1] (do you have a hardened child number, rather than an index?)", self.index)
     }
 }