inconsistent capitalization of hello.scala filename

[nathanallen]

The example filename is inconsistently capitalized as Hello.scala and hello.scala in two different examples:

See here

$ echo 'println("hello")' > Hello.scala
$ scala hello.scala

and here

$ cat hello.scala
object Hello {
  def main(args: Array[String]) {
    println("Hello, World!")
  }
}

$ scalac Hello.scala
$ scala Hello