Use pretty assertions!

hammond-data/Cargo.toml

@@ -38,6 +38,7 @@ version = "1.1.0"
 rand = "0.4.2"
 tempdir = "0.3.7"
 criterion = "0.2.2"
+pretty_assertions = "0.5.1"
 
 [[bench]]
 name = "bench"

hammond-data/src/lib.rs

@@ -20,6 +20,10 @@
 
 //! FIXME: Docs
 
+#[cfg(test)]
+#[macro_use]
+extern crate pretty_assertions;
+
 #[macro_use]
 extern crate derive_builder;
 #[macro_use]