Fix unusual indentation

A few lines of unusual indentation has crept into the code.

Author: tcharding

src/sha256d.rs

@@ -94,14 +94,14 @@ mod tests {
     use Hash;
     use HashEngine;
 
-#[derive(Clone)]
+    #[derive(Clone)]
     struct Test {
-input: &'static str,
-           output: Vec<u8>,
-           output_str: &'static str,
+        input: &'static str,
+        output: Vec<u8>,
+        output_str: &'static str,
     }
 
-#[test]
+    #[test]
     fn test() {
         let tests = vec![
             // Test vector copied out of rust-bitcoin

src/sha256t.rs

@@ -262,13 +262,13 @@ mod tests {
 
     #[test]
     fn test_sha256t() {
-       assert_eq!(
-           TestHash::hash(&[0]).to_hex(),
-           "29589d5122ec666ab5b4695070b6debc63881a4f85d88d93ddc90078038213ed"
-       );
-       assert_eq!(
-           NewTypeHash::hash(&[0]).to_hex(),
-           "29589d5122ec666ab5b4695070b6debc63881a4f85d88d93ddc90078038213ed"
-       );
+        assert_eq!(
+            TestHash::hash(&[0]).to_hex(),
+            "29589d5122ec666ab5b4695070b6debc63881a4f85d88d93ddc90078038213ed"
+        );
+        assert_eq!(
+            NewTypeHash::hash(&[0]).to_hex(),
+            "29589d5122ec666ab5b4695070b6debc63881a4f85d88d93ddc90078038213ed"
+        );
     }
 }