From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Fri, 5 Mar 2021 01:10:30 +0000 (+0100)
Subject: Add commentary to a test case.
X-Git-Tag: v9.3.0-rc1~295^2~4
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=26452ee9d8ae550fe7836fe8724956a49c874772;p=dealii.git

Add commentary to a test case.
---

diff --git a/tests/sundials/kinsol_01.cc b/tests/sundials/kinsol_01.cc
index 6e16c5ce81..d51db8620c 100644
--- a/tests/sundials/kinsol_01.cc
+++ b/tests/sundials/kinsol_01.cc
@@ -22,7 +22,10 @@
 
 #include "../tests.h"
 
-// provide only residual function, use internal solver.
+// Solve a nonlinear system but provide only residual function. KINSOL
+// then uses its internal solvers which are based on a
+// finite-difference approximation to the Jacobian and a direct
+// solver.
 
 /**
  * Solve the non linear problem