Add comments to bisection initialisation

dune/tectonic/myblockproblem.hh

@@ -29,8 +29,14 @@ template <class MyConvexProblemTypeTEMPLATE> class MyBlockProblem {
   class IterateObject;
 
   MyBlockProblem(MyConvexProblemType &problem) : problem(problem) {
-    bisection = Bisection(0.0, 1.0, 1e-12, true, 0);
-  };
+    bisection =
+        Bisection(0.0,   // acceptError: Stop if the search interval has
+                         // become smaller than this number
+                  1.0,   // acceptFactor: ?
+                  1e-12, // requiredResidual: ?
+                  true,  // fastQuadratic
+                  0);    // safety: acceptance factor for inexact minimization
+  }
 
   /** \brief Constructs and returns an iterate object */
   IterateObject getIterateObject() { return IterateObject(bisection, problem); }