[Jenkins] auto-formatting by clang-format version 10.0.0-4ubuntu1

Author: stan-buildbot

stan/math/prim/meta/ref_type.hpp

@@ -57,8 +57,8 @@ template <bool Condition, typename T>
 using ref_type_if_t = typename ref_type_if<Condition, T>::type;
 
 template <typename T>
-using ref_type_if_not_const_t
-  = typename ref_type_if<!is_constant<T>::value, T>::type;
+using ref_type_if_not_const_t =
+    typename ref_type_if<!is_constant<T>::value, T>::type;
 
 }  // namespace stan