Add small comments.

diff --git a/tests/lac/vector_add_and_dot.cc b/tests/lac/vector_add_and_dot.cc
index bfe935c089f75c0639d6639b69a2c5c5ff627292..adf634e8b981ed61c64764de6ffb55f435a2a174 100644 (file)
--- a/tests/lac/vector_add_and_dot.cc
+++ b/tests/lac/vector_add_and_dot.cc
@@ -38,8 +38,11 @@ void check ()
       check = v1;
       const number factor = 0.01432;
 
+      // do things by hand once
       v1.add(factor, v2);
       const number prod = v1 * v3;
+
+      // then do it a second time with the add_and_dot function
       const number prod_check = check.add_and_dot(factor, v2, v3);
       if (test == 0 && std::is_same<number,double>::value)
         {