Merge pull request eugenp#5711 from nnhai1991/master

BAEL-1913 Generate a random alphanumeric string in Kotlin

Author: lor6

core-kotlin/src/test/kotlin/com/baeldung/random/RandomStringUnitTest.kt

@@ -52,7 +52,7 @@ class RandomStringUnitTest {
  random.nextBytes(bytes)
 
  var randomString = (0..bytes.size - 1).map { i ->
- charPool.get((bytes[i] and 0xFF.toByte() and charPool.size.toByte()).toInt())
+ charPool.get((bytes[i] and 0xFF.toByte() and (charPool.size-1).toByte()).toInt())
  }.joinToString("")
 
  assert(randomString.matches(Regex(ALPHANUMERIC_REGEX)))