KT-20357: Simplify and update array contentToString() sample usage in standard library

Related issue: KT-20357

Author: oscarArismendi

libraries/stdlib/samples/test/samples/collections/arrays.kt

@@ -540,29 +540,11 @@ class Arrays {
             val emptyArray = arrayOf<Any>()
             assertPrints(emptyArray.contentToString(), "[]")
 
-            val doubleArray = arrayOf(1.0, 2.5, 3.14)
-            assertPrints(doubleArray.contentToString(), "[1.0, 2.5, 3.14]")
-
-            val floatArray = arrayOf(1.0f, 2.5f, 3.14f)
-            assertPrints(floatArray.contentToString(), "[1.0, 2.5, 3.14]")
-
-            val longArray = arrayOf(1L, 2L, 3L)
-            assertPrints(longArray.contentToString(), "[1, 2, 3]")
-
-            val intArray = arrayOf(1, 2, 3)
-            assertPrints(intArray.contentToString(), "[1, 2, 3]")
+            val strings = arrayOf("Hello", "world")
+            assertPrints(strings.contentToString(), "[Hello, world]")
 
-            val charArray = arrayOf('a', 'b', 'c')
-            assertPrints(charArray.contentToString(), "[a, b, c]")
-
-            val shortArray = arrayOf(1, 2, 3)
-            assertPrints(shortArray.contentToString(), "[1, 2, 3]")
-
-            val byteArray = arrayOf(1, 2, 3)
-            assertPrints(byteArray.contentToString(), "[1, 2, 3]")
-
-            val booleanArray = arrayOf(true, false, true)
-            assertPrints(booleanArray.contentToString(), "[true, false, true]")
+            val numbers: Array<Number> = arrayOf(3.14, 42L, 0.123f)
+            assertPrints(numbers.contentToString(), "[3.14, 42, 0.123]")
         }
 
         @Sample