fixes and standardization

.Example instead of *Example*

Use "[source,unlang] ---" for code blocks instead of ``

doc/unlang/cond_and.adoc

@@ -12,9 +12,11 @@ two conditions. This operator evaluates _condition-1_ and returns
 `false` if _condition-1_ returns `false`. Only if _condition-1_
 returns `true` is _condition-2_ evaluated and its result returned.
 
-*Examples:*
-
-`if (User-Name && EAP-Message) { ...`
+.Examples
+[source,unlang]
+----
+if (&User-Name && &EAP-Message) { ...
+----
 
 // Copyright (C) 2019 Network RADIUS SAS.  Licenced under CC-by-NC 4.0.
 // Development of this documentation was sponsored by Network RADIUS SAS.

doc/unlang/cond_or.adoc

@@ -12,9 +12,11 @@ expressions. This operator evaluates _condition-1_ and returns `true`
 if _condition-1_ returns true. Only if _condition-1_ returns `false`
 is _condition-2_ evaluated and its result returned.
 
-*Examples:*
-
-`if (User-Name || NAS-IP-Address) { ...`
+.Examples
+[source,unlang]
+----
+if (&User-Name || &NAS-IP-Address) { ...
+----
 
 // Copyright (C) 2019 Network RADIUS SAS.  Licenced under CC-by-NC 4.0.
 // Development of this documentation was sponsored by Network RADIUS SAS.

doc/unlang/condition.adoc

@@ -23,7 +23,7 @@ Conditions are expressed using the following syntax:
 | link:cond_data.adoc[data] | Check value of data.
 | link:cond_cmp.adoc[lhs OP rhs] | Compare two kinds of data.
 | link:cond_para.adoc[( condition )] | Check sub-condition
-| link:cond_not.adoc[( ! condition )] | Negate a conditional check
+| link:cond_not.adoc[! condition] | Negate a conditional check
 | link:cond_and.adoc[( condition ) && ...] | Check a condition AND the next one
 | link:cond_or.adoc[( condition ) \|\| ...] | Check a condition OR the next one
 |=====