Changed title and description for Kotlin, since arrays have "size" instead or "length" (#1444)

rules/S3981/kotlin/compliant.adoc

@@ -0,0 +1,8 @@
+== Compliant Solution
+
+[source,text]
+----
+if (!myList.isEmpty()) { ... }
+
+if (myArray.size >= 42) { ... }
+----

rules/S3981/kotlin/description.adoc

@@ -0,0 +1 @@
+The size of a collection or an array is always greater than or equal to zero. So testing that a size is greater than or equal to zero doesn't make sense, since the result is always `true`. Similarly testing that it is less than zero will always return `false`. Perhaps the intent was to check the non-emptiness of the collection or array instead. 

rules/S3981/kotlin/metadata.json

@@ -1,3 +1,3 @@
 {
-  
+  "title": "Collection and array sizes comparisons should make sense"
 }

rules/S3981/kotlin/noncompliant.adoc

@@ -0,0 +1,12 @@
+== Noncompliant Code Example
+
+[source,text]
+----
+if (myList.size >= 0) { ... }
+
+if (myList.size < 0) { ... }
+
+boolean result = myArray.size >= 0;
+
+if (0 > myArray.size) { ... }
+----

rules/S3981/kotlin/rule.adoc

@@ -1,4 +1,8 @@
-include::../rule.adoc[]
+include::description.adoc[]
+
+include::noncompliant.adoc[]
+
+include::compliant.adoc[]
 
 ifdef::env-github,rspecator-view[]