Revert "Update doxygen"

This reverts commit 0c2002243b2d27245c478653d32a585bfa3edff3.

diff --git a/doc/context_history_doc.h b/doc/context_history_doc.h
index 4f040ed..617d984 100644 (file)
--- a/doc/context_history_doc.h
+++ b/doc/context_history_doc.h
@@ -31,7 +31,7 @@
  * <i>application usage</i>, <i>peak time of activities</i>, and <i>common setting for activities</i>.
  * See #context_history_data_e for all available statistic items.
  * After choosing a statistic item to retrieve, a @em filter can be set to narrow down to the data you need.@n
- * For more details about the available filter keys and the data attributes provided by each item,
+ * For more details about the available filter keys, and the data attributes provided by each item,
  * please refer the programming guide and the tutorial.
  *
  */