Minor update to log in chain method

Author: davidcorteso

fidimag/common/chain_method_base.py

@@ -703,7 +703,7 @@ def relax(self, dt=1e-8, stopping_dYdt=1, max_iterations=1000,
             # -----------------------------------------------------------------
 
             log.debug(time.strftime("%Y-%m-%d %H:%M:%S ", time.localtime()) +
-                      "step: {:.3g}, step_size: {:.3g}, "
+                      "step: {:.6g}, step_size: {:.3g}, "
                       "max dYdt: {:.3g} "
                       "max|G|: {:.3g} "
                       "max|gradE|: {:.3g} "