Update examples/step-68/doc/results.dox

Co-authored-by: Peter Munch <peterrmuench@gmail.com>

diff --git a/examples/step-68/doc/results.dox b/examples/step-68/doc/results.dox
index 0eb5b337b4dfdcd6c97eeaa7002d0d6c223d5052..5df1573b4fa3a65e7607373172875592d7068aa6 100644 (file)
--- a/examples/step-68/doc/results.dox
+++ b/examples/step-68/doc/results.dox
@@ -65,8 +65,8 @@ Writing background field file: background-2000
 
 We note that, by default, the simulation runs the particle tracking with
 an analytical velocity for 2000 iterations, then runs the particle tracking with
-velocity interpolation for the same duration. The results are written every
-10 iterations.
+velocity interpolationn for the same duration. The results are written every
+10th iteration.
 
 <h3> Motion of the particles </h3>