fix

Author: lihaoyi

compiler/test-resources/repl/i15493

@@ -68,7 +68,7 @@ scala> res15.toString
 val res16: String = NFloat@3f800000
 
 scala> 1.0F
-val res17: Float = 1.0
+val res17: Float = 1.0F
 
 scala> class NDouble(val x: Double) extends AnyVal
 // defined class NDouble
@@ -92,7 +92,7 @@ scala> res21.toString
 val res22: String = NChar@61
 
 scala> 'a'
-val res23: Char = a
+val res23: Char = 'a'
 
 scala> class NString(val x: String) extends AnyVal
 // defined class NString
@@ -104,7 +104,7 @@ scala> res24.toString
 val res25: String = NString@364492
 
 scala> "test"
-val res26: String = test
+val res26: String = "test"
 
 scala> class CustomToString(val x: Int) extends AnyVal { override def toString(): String = s"Test$x" }
 // defined class CustomToString

project/Build.scala

@@ -755,7 +755,8 @@ object Build {
                 .replace("if (head != null && head.hasNext) true", "if (head != null && head.nn.hasNext) true")
                 .replace("head.next()", "head.nn.next()")
                 .replace("abstract class Walker", "@scala.annotation.nowarn abstract class Walker")
-                .replace("object TPrintLowPri", "@scala.annotation.nowarn object TPrintLowPri")).getBytes
+                .replace("object TPrintLowPri", "@scala.annotation.nowarn object TPrintLowPri")
+                .replace("x.toString match{", "scala.runtime.ScalaRunTime.stringOf(x) match{")).getBytes
           )
           file.toFile