@item @code{GNUNET_TESTBED_TOPOLOGY_FROM_FILE}: The topology information
is loaded from a file. The path to the file has to be given.
-@xref{Topology file format} for the format of this file.
+@xref{Topology file format}, for the format of this file.
@item @code{GNUNET_TESTBED_TOPOLOGY_NONE}: No topology
@end itemize
Similarly, the topology @code{FROM_FILE} requires the option
@code{OVERLAY_TOPOLOGY_FILE} to contain the path of the file containing
the topology information. This option is ignored for the rest of the
-topologies. @xref{Topology file format} for the format of this file.
+topologies. @xref{Topology file format}, for the format of this file.
@c ***********************************************************************
@node Hosts file format