Added comment that you must use :paste mode for this code

Author: Dean Wampler

src/main/scala/progscala2/implicits/implicit-conversions-resolution.sc

@@ -1,6 +1,8 @@
 // src/main/scala/progscala2/implicits/implicit-conversions-resolution.sc
 import scala.language.implicitConversions
 
+// WARNING: You must :paste mode in the REPL for the following.
+// Using :load won't compile the two definitions together!
 case class Foo(s: String)
 object Foo {
   implicit def fromString(s: String): Foo = Foo(s)