use `hash.to_byte_array` to check equality with `test.output`

Tests in 'hashes' used various ways to do this that looked different but
did the same.

hashes/src/hash160.rs

@@ -98,7 +98,7 @@ mod tests {
             }
             let manual_hash = Hash::from_engine(engine);
             assert_eq!(hash, manual_hash);
-            assert_eq!(hash.to_byte_array()[..].as_ref(), test.output.as_slice());
+            assert_eq!(hash.to_byte_array(), test.output);
         }
     }
 

hashes/src/ripemd160.rs

@@ -489,7 +489,7 @@ mod tests {
             }
             let manual_hash = ripemd160::Hash::from_engine(engine);
             assert_eq!(hash, manual_hash);
-            assert_eq!(hash.as_byte_array(), test.output.as_slice());
+            assert_eq!(hash.to_byte_array(), test.output);
         }
     }
 

hashes/src/sha1.rs

@@ -193,7 +193,7 @@ mod tests {
             }
             let manual_hash = sha1::Hash::from_engine(engine);
             assert_eq!(hash, manual_hash);
-            assert_eq!(hash.as_byte_array(), test.output.as_slice());
+            assert_eq!(hash.to_byte_array(), test.output);
         }
     }
 

hashes/src/sha256.rs

@@ -926,7 +926,7 @@ mod tests {
             }
             let manual_hash = sha256::Hash::from_engine(engine);
             assert_eq!(hash, manual_hash);
-            assert_eq!(hash.to_byte_array()[..].as_ref(), test.output.as_slice());
+            assert_eq!(hash.to_byte_array(), test.output);
         }
     }
 

hashes/src/sha256d.rs

@@ -92,7 +92,7 @@ mod tests {
             let sha2d_hash = sha2_hash.hash_again();
             assert_eq!(hash, sha2d_hash);
 
-            assert_eq!(hash.to_byte_array()[..].as_ref(), test.output.as_slice());
+            assert_eq!(hash.to_byte_array(), test.output);
         }
     }
 

hashes/src/sha384.rs

@@ -133,7 +133,7 @@ mod tests {
             }
             let manual_hash = sha384::Hash::from_engine(engine);
             assert_eq!(hash, manual_hash);
-            assert_eq!(hash.to_byte_array()[..].as_ref(), test.output.as_slice());
+            assert_eq!(hash.to_byte_array(), test.output);
         }
     }
 }

hashes/src/sha512.rs

@@ -380,7 +380,7 @@ mod tests {
             }
             let manual_hash = sha512::Hash::from_engine(engine);
             assert_eq!(hash, manual_hash);
-            assert_eq!(hash.to_byte_array()[..].as_ref(), test.output.as_slice());
+            assert_eq!(hash.to_byte_array(), test.output);
         }
     }
 

hashes/src/sha512_256.rs

@@ -133,7 +133,7 @@ mod tests {
             }
             let manual_hash = sha512_256::Hash::from_engine(engine);
             assert_eq!(hash, manual_hash);
-            assert_eq!(hash.to_byte_array()[..].as_ref(), test.output.as_slice());
+            assert_eq!(hash.to_byte_array(), test.output);
         }
     }
 }