diff --git a/core/src/wrapper/ConfAdapter.cpp b/core/src/wrapper/ConfAdapter.cpp
index b121372a26..0ab38d3394 100644
--- a/core/src/wrapper/ConfAdapter.cpp
+++ b/core/src/wrapper/ConfAdapter.cpp
@@ -182,7 +182,7 @@ NSGConfAdapter::Match(const TempMetaConf& metaconf) {
     auto scale_factor = round(metaconf.dim / 128.0);
     scale_factor = scale_factor >= 4 ? 4 : scale_factor;
     conf->nprobe = int64_t(conf->nlist * 0.01);
-    conf->knng = 40 + 10 * scale_factor; // the size of knng
+    conf->knng = 40 + 10 * scale_factor;  // the size of knng
     conf->search_length = 40 + 5 * scale_factor;
     conf->out_degree = 50 + 5 * scale_factor;
     conf->candidate_pool_size = 200 + 100 * scale_factor;
diff --git a/core/unittest/wrapper/test_wrapper.cpp b/core/unittest/wrapper/test_wrapper.cpp
index 11a8b8e01a..a07fafc7b8 100644
--- a/core/unittest/wrapper/test_wrapper.cpp
+++ b/core/unittest/wrapper/test_wrapper.cpp
@@ -303,4 +303,4 @@ TEST(whatever, test_config) {
 //     dim); std::cout << points_num << " " << dim << std::endl;
 
 //     index_->BuildAll(points_num, data, ids.data(), conf);
-// }
\ No newline at end of file
+// }
diff --git a/core/unittest/wrapper/utils.h b/core/unittest/wrapper/utils.h
index cc1926302d..05dc92f2d6 100644
--- a/core/unittest/wrapper/utils.h
+++ b/core/unittest/wrapper/utils.h
@@ -89,13 +89,13 @@ class ParamGenerator {
         return instance;
     }
 
-    knowhere::Config 
+    knowhere::Config
     GenSearchConf(const milvus::engine::IndexType& type, const milvus::engine::TempMetaConf& conf) {
         auto adapter = milvus::engine::AdapterMgr::GetInstance().GetAdapter(type);
         return adapter->MatchSearch(conf, type);
     }
 
-    knowhere::Config 
+    knowhere::Config
     GenBuild(const milvus::engine::IndexType& type, const milvus::engine::TempMetaConf& conf) {
         auto adapter = milvus::engine::AdapterMgr::GetInstance().GetAdapter(type);
         return adapter->Match(conf);