docs: improve formatting in iov2.adoc

Author: hansu

docs/src/config/iov2.adoc

@@ -53,26 +53,21 @@ the realtime I/O provided by link:../man/man9/motion.9.html[motion] instead.
 
 INI file options:
 
-* [EMCIO] section
+.[EMCIO] section
+PROTOCOL_VERSION = 2 :: Defaults to 2. Setting to 1 will emulate old iocontrol behaviour. 
 
-* PROTOCOL_VERSION = 2 
-  Defaults to 2. Setting to 1 will emulate old iocontrol behaviour. 
-
-* EMCIO = iov2 -support-start-change
-  You need to explicitly enable the start-change protocol by adding the 
+EMCIO = iov2 -support-start-change :: You need to explicitly enable the start-change protocol by adding the 
   -support-start-change option; otherwise the start-change pin remains
   low and   start-change-ack is ignored. The reason for this is better
-  backwards compatibility. 
-
-* [TASK] section
-
-* IO_ERROR : printf-style template for operator error display (negative
-  toolchanger fault codes) . No quoting needed. Example: IO_ERROR = Toolchanger
-  fault %d . Default: toolchanger error %d.
+  backwards compatibility.
 
-* [EMC] section
+.[TASK] section
+IO_ERROR :: Printf-style template for operator error display (negative
+  toolchanger fault codes) . No quoting needed. Example: `IO_ERROR = Toolchanger
+  fault %d`. Default: toolchanger error %d.
 
-* DEBUG : To get a (quite detailed) trace, set either the RCS debugging flag
+.[EMC] section +
+DEBUG :: To get a (quite detailed) trace, set either the RCS debugging flag
   (0x00000200) to turn on RCS debugging messages all over LinuxCNC or use the
   new iocontrol debugging bit (0x00001000) only for iov2 messages.