Remove PreName add (almost) all other implicit conversions

compiler/src/dotty/tools/repl/terminal/Ansi.scala

@@ -112,7 +112,7 @@ object Ansi {
   object Str {
     @sharable lazy val ansiRegex = "\u001B\\[[;\\d]*m".r
 
-    implicit def parse(raw: CharSequence): Str = {
+    def parse(raw: CharSequence): Str = {
       val chars        = new Array[Char](raw.length)
       val colors       = new Array[Short](raw.length)
       var currentIndex = 0

compiler/src/dotty/tools/repl/terminal/Protocol.scala

@@ -10,7 +10,7 @@ case class TermState(
   inputs: LazyList[Int],
   buffer: Vector[Char],
   cursor: Int,
-  msg: Ansi.Str = ""
+  msg: Ansi.Str = Ansi.Str.parse("")
 ) extends TermAction
 
 object TermState {

compiler/src/dotty/tools/repl/terminal/Terminal.scala

@@ -301,7 +301,7 @@ object Terminal {
     lazy val ansi = new AnsiNav(writer)
     lazy val (width, _, initialConfig) = TTY.init()
     try {
-      readChar(TermState(LazyList.continually(reader.read()), Vector.empty, 0, ""), 0)
+      readChar(TermState(LazyList.continually(reader.read()), Vector.empty, 0, Ansi.Str.parse("")), 0)
     }
     finally {
 

compiler/src/dotty/tools/repl/terminal/Utils.scala

@@ -202,7 +202,7 @@ object FrontEndUtils {
     transpose(grouped).iterator.flatMap { group =>
       val last = group.last
       group.init.map(
-        x => x ++ " " * (width / columns - x.length)
+        x => x ++ Ansi.Str.parse(" " * (width / columns - x.length))
       ) :+ last :+ Ansi.Str.parse(newLine)
     }
     .map(_.render)

compiler/src/dotty/tools/repl/terminal/filters/HistoryFilter.scala

@@ -106,7 +106,7 @@ class HistoryFilter(
     searchHistory(historyIndex - 1, -1, b, b)
 
   def wrap(rest: LazyList[Int], out: (Vector[Char], Int, String)) =
-    TS(rest, out._1, out._2, out._3)
+    TS(rest, out._1, out._2, Ansi.Str.parse(out._3))
 
   def ctrlR(b: Vector[Char], c: Int) =
     if (activeSearch) up(b, c)

compiler/src/dotty/tools/repl/terminal/filters/UndoFilter.scala

@@ -40,7 +40,7 @@ case class UndoFilter(maxUndo: Int = 25) extends DelegateFilter("UndoFilter") {
   var undoIndex = 0
   /**
     * An enum representing what the user is "currently" doing. Used to
-    * collapse sequential actions into one undo step: e.g. 10 plai 
+    * collapse sequential actions into one undo step: e.g. 10 plai
     * chars typed becomes 1 undo step, or 10 chars deleted becomes one undo
     * step, but 4 chars typed followed by 3 chars deleted followed by 3 chars
     * typed gets grouped into 3 different undo steps
@@ -147,8 +147,8 @@ object UndoState {
 }
 
 object UndoFilter {
-  val undoMsg       = Ansi.Color.Blue(" ...undoing last action, `Alt -` or `Esc -` to redo")
-  val cannotUndoMsg = Ansi.Color.Blue(" ...no more actions to undo")
-  val redoMsg       = Ansi.Color.Blue(" ...redoing last action")
-  val cannotRedoMsg = Ansi.Color.Blue(" ...no more actions to redo")
+  val undoMsg       = Ansi.Color.Blue(Ansi.Str.parse(" ...undoing last action, `Alt -` or `Esc -` to redo"))
+  val cannotUndoMsg = Ansi.Color.Blue(Ansi.Str.parse(" ...no more actions to undo"))
+  val redoMsg       = Ansi.Color.Blue(Ansi.Str.parse(" ...redoing last action"))
+  val cannotRedoMsg = Ansi.Color.Blue(Ansi.Str.parse(" ...no more actions to redo"))
 }