[#2208] update documentation

diff --git a/doc/sphinx/arm/hooks.rst b/doc/sphinx/arm/hooks.rst
index efffcbde27aa38aecc09734bd77cff776d7e47b8..d9528a8339d529997b77614bfaaa1c224f1ce2d4 100644 (file)
--- a/doc/sphinx/arm/hooks.rst
+++ b/doc/sphinx/arm/hooks.rst
@@ -741,8 +741,9 @@ packet.
 
 The ``timestamp-format`` parameter can be used to change the timestamp logged
 at the beginning of each line. Permissible formatting is the one supported by
-strftime. The default is: "%Y-%m-%d %H:%M:%S %Z". This parameter has no effect
-for the database backends, where the timestamp is defined at the schema level.
+strftime plus the '%Q' extra format which adds the microseconds subunits. The
+default is: "%Y-%m-%d %H:%M:%S %Z". This parameter has no effect for the
+database backends, where the timestamp is defined at the schema level.
 
 Examples: