diff --git a/matrix/Matrix.hpp b/matrix/Matrix.hpp
index f8e35697b0..9461fb2619 100644
--- a/matrix/Matrix.hpp
+++ b/matrix/Matrix.hpp
@@ -426,16 +426,16 @@ Matrix<Type, M, N> operator*(Type scalar, const Matrix<Type, M, N> &other)
 #if defined(SUPPORT_STDIOSTREAM)
 template<typename Type, size_t  M, size_t N>
 std::ostream& operator<<(std::ostream& os,
-        const matrix::Matrix<Type, M, N>& matrix)
+                         const matrix::Matrix<Type, M, N>& matrix)
 {
-        for (size_t i = 0; i < M; ++i) {
-            os << "[";
-            for (size_t j = 0; j < N; ++j) {
-                os << std::setw(10) << static_cast<double>(matrix(i, j));
-                os << "\t";
-            }
-            os << "]" << std::endl;
+    for (size_t i = 0; i < M; ++i) {
+        os << "[";
+        for (size_t j = 0; j < N; ++j) {
+            os << std::setw(10) << static_cast<double>(matrix(i, j));
+            os << "\t";
         }
+        os << "]" << std::endl;
+    }
     return os;
 }
 #endif // defined(SUPPORT_STDIOSTREAM)
diff --git a/test/attitude.cpp b/test/attitude.cpp
index 9ae0f27938..1d008d2b28 100644
--- a/test/attitude.cpp
+++ b/test/attitude.cpp
@@ -137,7 +137,7 @@ int main()
     float scalar = 0.5;
     Quatf q_scalar_mul(1.0f, 2.0f, 3.0f, 4.0f);
     Quatf q_scalar_mul_check(1.0f * scalar, 2.0f * scalar,
-            3.0f * scalar,  4.0f * scalar);
+                             3.0f * scalar,  4.0f * scalar);
     Quatf q_scalar_mul_res = scalar * q_scalar_mul;
     assert(q_scalar_mul_check == q_scalar_mul_res);
     Quatf q_scalar_mul_res2 = q_scalar_mul * scalar;