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

Author: stan-buildbot

stan/math/prim/meta/is_arena_matrix.hpp

@@ -31,7 +31,8 @@ using require_arena_matrix_t = require_t<is_arena_matrix<std::decay_t<T>>>;
 /*! \brief Require type does not satisfy @ref is_arena_matrix */
 /*! @tparam T the type to check */
 template <typename T>
-using require_not_arena_matrix_t = require_t<bool_constant<!is_arena_matrix<std::decay_t<T>>::value>>;
+using require_not_arena_matrix_t
+    = require_t<bool_constant<!is_arena_matrix<std::decay_t<T>>::value>>;
 /*! @} */
 
 }  // namespace stan