Fix doxygen warnings.

client/mysqldump.c:
  Fix doxygen warnings
mysys/test_charset.c:
  Fix doxygen warnings
sql/event_db_repository.cc:
  Fix doxygen warnings
sql/events.cc:
  Fix doxygen warnings
sql/events.h:
  Fix doxygen warnings
sql/item_create.cc:
  Fix doxygen warnings, style.
sql/item_create.h:
  Fix coding style.
sql/item_subselect.cc:
  Fix doxygen warnings
sql/lock.cc:
  Fix doxygen warnings
sql/sp.cc:
  Fix doxygen warnings
sql/sp_head.h:
  Fix doxygen warnings
sql/sql_analyse.cc:
  Fix doxygen warnings
sql/sql_analyse.h:
  Fix doxygen warnings
sql/sql_base.cc:
  Fix doxygen warnings
sql/sql_db.cc:
  Fix doxygen warnings
sql/sql_lex.cc:
  Fix doxygen warnings
sql/sql_lex.h:
  Fix doxygen warnings
sql/sql_parse.cc:
  Fix doxygen warnings
sql/sql_plugin.cc:
  Fix doxygen warnings
sql/sql_prepare.cc:
  Fix doxygen warnings
sql/sql_show.cc:
  Fix doxygen warnings
sql/sql_trigger.cc:
  Fix doxygen warnings
sql/sql_update.cc:
  Fix doxygen warnings
sql/table.h:
  Fix doxygen warnings

sql/sql_update.cc

@@ -86,10 +86,10 @@ static bool check_fields(THD *thd, List<Item> &items)
 /**
   @brief Re-read record if more columns are needed for error message.
 
-  @detail If we got a duplicate key error, we want to write an error
-    message containing the value of the duplicate key. If we do not have
-    all fields of the key value in record[0], we need to re-read the
-    record with a proper read_set.
+  If we got a duplicate key error, we want to write an error
+  message containing the value of the duplicate key. If we do not have
+  all fields of the key value in record[0], we need to re-read the
+  record with a proper read_set.
 
   @param[in] error   error number
   @param[in] table   table