Add clang-format (#1086)

Co-authored-by: mwilsnd <mwilsnd@gmail.com>

render-test/allocation_index.cpp

@@ -19,7 +19,9 @@ std::mutex indexMutex;
 class FlagGuard {
 public:
     explicit FlagGuard(std::atomic_bool& flag_)
-        : flag(flag_) { flag = true; }
+        : flag(flag_) {
+        flag = true;
+    }
     ~FlagGuard() { flag = false; }
 
 private:
@@ -74,7 +76,7 @@ void AllocationIndex::reset() {
 
 // static
 void* AllocationIndex::allocate(size_t size) {
-    void *ptr = std::malloc(size);
+    void* ptr = std::malloc(size);
     if (ptr && canModifyIndex()) addToIndex(size, ptr);
     return ptr;
 }