test(samples): add new samples

Author: kotlin-samples-pusher-bot

src/test/resources/test-compile-data/jvm/kotlin-web-site/equality/1b67aa5dcc7e0798d83839d86f1abe76.1.kt

@@ -0,0 +1,14 @@
+fun main() {
+    var a = "hello"
+    var b = "hello"
+    var c = null
+    var d = null
+    var e = d
+
+    println(a == b)
+    // true
+    println(a == c)
+    // false
+    println(c == e)
+    // true
+}

src/test/resources/test-compile-data/jvm/kotlin-web-site/equality/1b67aa5dcc7e0798d83839d86f1abe76.2.kt

@@ -0,0 +1,14 @@
+fun main() {
+    var a = "Hello"
+    var b = a
+    var c = "world"
+    var d = "world"
+
+    println(a === b)
+    // true
+    println(a === c)
+    // false
+    println(c === d)
+    // true
+
+}