Modify rule S2159: Add Dart language

rules/S2159/dart/rule.adoc

@@ -1,9 +1,9 @@
 == Why is this an issue?
 
-Comparisons of dissimilar types will always return false. The comparison and all its dependent code can simply be removed. This includes:
+Comparisons of dissimilar types will always return `false`. The comparison and all its dependent code can simply be removed. This includes:
 
-* comparing an object with null
-* comparing an object with an unrelated primitive (E.G. a string with an int)
+* comparing an object with `null`
+* comparing an object with an unrelated primitive (e.g. a `String` with an `int`)
 * comparing unrelated types
 
 === Noncompliant code example
@@ -12,12 +12,34 @@ Comparisons of dissimilar types will always return false. The comparison and all
 ----
 void f() {
   var a = "Hello, World!";
-  if (a == 42) {
+  if (a == 42) { // Noncompliant: comparing a String with an int
     print("BOOM!");
   }
 }
 ----
 
 == Resources
 
-* https://dart.dev/tools/linter-rules/unrelated_type_equality_checks[Dart Lint rule]
+=== Documentation
+
+* Dart Docs - https://dart.dev/tools/linter-rules/unrelated_type_equality_checks[Dart Linter rule - unrelated_type_equality_checks]
+
+ifdef::env-github,rspecator-view[]
+
+'''
+== Implementation Specification
+(visible only on this page)
+
+=== Message
+
+The type of the right operand ('bool') isn't a subtype or a supertype of the left operand ('int').
+
+=== Highlighting
+
+The `==` operator or `!=` operator.
+
+'''
+== Comments And Links
+(visible only on this page)
+
+endif::env-github,rspecator-view[]

rules/S2159/metadata.json

@@ -1,5 +1,5 @@
 {
-  "title": "Silly equality checks should not be made",
+  "title": "Unnecessary equality checks should not be made",
   "type": "BUG",
   "code": {
     "impacts": {