diff -r f70d74fea67f -r 2a30c7dfe3ed progs/mandelbrot.sc
--- a/progs/mandelbrot.sc	Sun Sep 15 12:57:59 2024 +0100
+++ b/progs/mandelbrot.sc	Mon Jul 21 16:38:07 2025 +0100
@@ -3,11 +3,13 @@
 //
 //   see https://en.wikipedia.org/wiki/Mandelbrot_set
 //
-// You can run on the file one the commandline with
+// You can run the file on the commandline with
 //
 //   scala mandelbrot.sc
 //
+// Or inside the REPL with
 //
+//   scala --extra-jars scala-parallel-collections_3-1.0.4.jar
 //
 // !! UPDATE ON TIMING: On my faster Mac-M1 machine
 // !! the times for the first example are ca. 4 secs for
@@ -16,7 +18,6 @@
 
 // for parallel collections
 //> using dep org.scala-lang.modules::scala-parallel-collections:1.0.4
-import scala.language.implicitConversions.*
 import scala.collection.parallel.CollectionConverters.*
 
 // for graphics
@@ -177,7 +178,6 @@
                 exc2 - delta * n, 1000))} secs")
 
 
-
 // Larry Paulson's example
 val exl1 = -0.74364990 + 0.13188170 * i
 val exl2 = -0.74291189 + 0.13261971 * i