diff --git a/Stream_lines_2/doc_tex/Stream_lines_2_ref/Runge_kutta_integrator_2.tex b/Stream_lines_2/doc_tex/Stream_lines_2_ref/Runge_kutta_integrator_2.tex
index 4836108dd31..150d925d40e 100644
--- a/Stream_lines_2/doc_tex/Stream_lines_2_ref/Runge_kutta_integrator_2.tex
+++ b/Stream_lines_2/doc_tex/Stream_lines_2_ref/Runge_kutta_integrator_2.tex
@@ -1,4 +1,4 @@
-`%% +------------------------------------------------------------------------+
+%% +------------------------------------------------------------------------+
 % | Reference manual page: Runge_kutta_integrator_2.tex
 % +------------------------------------------------------------------------+
 % | 07.12.2004 Abdelkrim Mebarki