libstore: improve hash mismatch error messages

Use the same output ordering and format everywhere.

This is such a common issue that we trade the single-line error message for
more readability.

Old message:
```
fixed-output derivation produced path '/nix/store/d4nw9x2sy9q3r32f3g5l5h1k833c01vq-example.com' with sha256 hash '08y4734bm2zahw75b16bcmcg587vvyvh0n11gwiyir70divwp1rm' instead of the expected hash '1xzwnipjd54wl8g93vpw6hxnpmdabq0wqywriiwmh7x8k0lvpq5m'
```

New message:
```
hash mismatch in fixed-output derivation '/nix/store/d4nw9x2sy9q3r32f3g5l5h1k833c01vq-example.com':
  wanted: sha256:1xzwnipjd54wl8g93vpw6hxnpmdabq0wqywriiwmh7x8k0lvpq5m
  got:    sha256:08y4734bm2zahw75b16bcmcg587vvyvh0n11gwiyir70divwp1rm

```

1 files changed, 2 insertions, 2 deletions

diff --git a/src/libstore/local-store.cc b/src/libstore/local-store.cc
index e1cb423d151f..5b4e7ca4ca99 100644
--- a/src/libstore/local-store.cc
+++ b/src/libstore/local-store.cc
@@ -1022,11 +1022,11 @@ void LocalStore::addToStore(const ValidPathInfo & info, Source & source,
             auto hashResult = hashSink.finish();
 
             if (hashResult.first != info.narHash)
-                throw Error("hash mismatch importing path '%s'; expected hash '%s', got '%s'",
+                throw Error("hash mismatch importing path '%s';\n  wanted: %s\n  got:    %s",
                     info.path, info.narHash.to_string(), hashResult.first.to_string());
 
             if (hashResult.second != info.narSize)
-                throw Error("size mismatch importing path '%s'; expected %s, got %s",
+                throw Error("size mismatch importing path '%s';\n  wanted: %s\n  got:   %s",
                     info.path, info.narSize, hashResult.second);
 
             autoGC();