1 files changed, 2 insertions, 0 deletions
diff --git a/mtxmatrix.h b/mtxmatrix.h
index e2f8c10..34c20c2 100644
--- a/mtxmatrix.h
+++ b/mtxmatrix.h
@@ -191,8 +191,10 @@ class MtxMatrix: public MtxValue
      * Return the address of the line at requested index.
      * 
      * NULL is returned if index is invalid. Usage example :
+     * <pre>
      * MtxRational r;
      * r = matrix[1][2];
+     * </pre>
      */
     MtxRational * operator[](size_t index) const;
     MtxMatrix operator+() const;