Create rule S5869[kotlin]: Character classes in regular expressions should not contain the same character twice (#441)

rules/S5869/java/rule.adoc

@@ -21,8 +21,8 @@ ifdef::env-github,rspecator-view[]
 == Implementation Specification
 (visible only on this page)
 
-include::message.adoc[]
+include::../message.adoc[]
 
-include::highlighting.adoc[]
+include::../highlighting.adoc[]
 
 endif::env-github,rspecator-view[]

rules/S5869/kotlin/metadata.json

@@ -0,0 +1,3 @@
+{
+
+}

rules/S5869/kotlin/rule.adoc

@@ -0,0 +1,28 @@
+include::../description.adoc[]
+
+== Noncompliant Code Example
+
+----
+Regex("[0-99]") // Noncompliant, this won't actually match strings with two digits
+Regex("[0-9.-_]") // Noncompliant, .-_ is a range that already contains 0-9 (as well as various other characters such as capital letters)
+----
+
+
+== Compliant Solution
+
+----
+Regex("[0-9]{1,2}")
+Regex("[0-9.\\-_]")
+----
+
+ifdef::env-github,rspecator-view[]
+
+'''
+== Implementation Specification
+(visible only on this page)
+
+include::../message.adoc[]
+
+include::../highlighting.adoc[]
+
+endif::env-github,rspecator-view[]