Fix docstring code highlighting

parsl/executors/high_throughput/executor.py

@@ -87,13 +87,13 @@
     address : string
         An address to connect to the main Parsl process which is reachable from the network in which
         workers will be running. This field expects an IPv4 address (xxx.xxx.xxx.xxx) (when
-        enable_ipv6 is not set)
+        ``enable_ipv6`` is not set)
         Most login nodes on clusters have several network interfaces available, only some of which
         can be reached from the compute nodes. This field can be used to limit the executor to listen
         only on a specific interface, and limiting connections to the internal network.
         By default, the executor will attempt to enumerate and connect through all possible addresses.
         Setting an address here overrides the default behavior.
-        If `enable_ipv6` is set, specify an IPv6 address in brackets, for eg: address=[::1]
+        If ``enable_ipv6`` is set, specify an IPv6 address in brackets, for eg: ``address=[::1]``
         default=None
 
     worker_ports : (int, int)