style(3p/nix): Add braces around single-line conditionals r/771

These were not caught by the previous clang-tidy invocation, but were
instead sorted out using amber[0] as such:

    ambr --regex 'if (\(.+\))\s([a-z].*;)' 'if $1 { $2 }'

[0]: https://github.com/dalance/amber

1 files changed, 6 insertions, 2 deletions

diff --git a/third_party/nix/src/libstore/local-fs-store.cc b/third_party/nix/src/libstore/local-fs-store.cc
index 3dd63498b2..c1efbb76d8 100644
--- a/third_party/nix/src/libstore/local-fs-store.cc
+++ b/third_party/nix/src/libstore/local-fs-store.cc
@@ -68,7 +68,9 @@ ref<FSAccessor> LocalFSStore::getFSAccessor() {
 }
 
 void LocalFSStore::narFromPath(const Path& path, Sink& sink) {
-  if (!isValidPath(path)) throw Error(format("path '%s' is not valid") % path);
+  if (!isValidPath(path)) {
+    throw Error(format("path '%s' is not valid") % path);
+  }
   dumpPath(getRealStoreDir() + std::string(path, storeDir.size()), sink);
 }
 
@@ -85,7 +87,9 @@ std::shared_ptr<std::string> LocalFSStore::getBuildLog(const Path& path_) {
     } catch (InvalidPath&) {
       return nullptr;
     }
-    if (path == "") return nullptr;
+    if (path == "") {
+      return nullptr;
+    }
   }
 
   string baseName = baseNameOf(path);