converts l_2 to LaTeX code

diff --git a/include/deal.II/base/point.h b/include/deal.II/base/point.h
index 7599edde4c5356496fd0979990e2a7789c975b8c..d6a109c10e59c5c0d5e39c62a43555552b443cf6 100644 (file)
--- a/include/deal.II/base/point.h
+++ b/include/deal.II/base/point.h
@@ -307,7 +307,7 @@ public:
 
   /**
    * Return the Euclidean distance of <tt>this</tt> point to the point
-   * <tt>p</tt>, i.e. the <tt>l_2</tt> norm of the difference between the
+   * <tt>p</tt>, i.e. the $l_2$ norm of the difference between the
    * vectors representing the two points.
    *
    * @note This function can also be used in CUDA device code.