style(3p/nix): Enforce braces around loops and conditionals r/767

This change was generated with:

  fd -e cc -e hh | xargs -I{} clang-tidy {} -p ~/projects/nix-build/ \
    --checks='-*,readability-braces-around-statements' --fix \
    -fix-errors

Some manual fixes were applied because some convoluted unbraced
statements couldn't be untangled by clang-tidy.

This commit still includes invalid files, but I decided to clean them
up in a subsequent commit so that it becomes more obvious where
clang-tidy failed. Maybe this will allow for a bug-report to
clang-tidy.

1 files changed, 3 insertions, 1 deletions

diff --git a/third_party/nix/src/libstore/references.cc b/third_party/nix/src/libstore/references.cc
index d8c4620a16c9..63cd284732a6 100644
--- a/third_party/nix/src/libstore/references.cc
+++ b/third_party/nix/src/libstore/references.cc
@@ -18,7 +18,9 @@ static void search(const unsigned char* s, size_t len, StringSet& hashes,
   static bool initialised = false;
   static bool isBase32[256];
   if (!initialised) {
-    for (unsigned int i = 0; i < 256; ++i) isBase32[i] = false;
+    for (unsigned int i = 0; i < 256; ++i) {
+      isBase32[i] = false;
+    }
     for (unsigned int i = 0; i < base32Chars.size(); ++i)
       isBase32[(unsigned char)base32Chars[i]] = true;
     initialised = true;