Fix for SI-4945, repl hang on -i input.

Other breakage had accumulated among Settings. I determined
that once upon a time, "MultiStringSetting" accepted arguments
like this:

  scala -foo bip bop bar

Somewhere this was changed to force a : argument, like

  scala -foo:bip,bop,bar

This incurs breakage.  The repl has always advertised its -i
option without a colon and it has always been a MultiStringSetting.
Forcing everything into the : seemed like the wrong thing,
especially because it will stomp on any whitespace containing
arguments, whereas in the original form

  scala -foo bip "bop bar" baz

will yield its arguments as given.

So lacking any good ideas and knowing something probably depends
on each way already, I made it work both ways.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/reflect/scala/reflect/internal/settings/MutableSettings.scala b/src/reflect/scala/reflect/internal/settings/MutableSettings.scala
index e9899f690d..96fd50646f 100644
--- a/src/reflect/scala/reflect/internal/settings/MutableSettings.scala
+++ b/src/reflect/scala/reflect/internal/settings/MutableSettings.scala
@@ -14,6 +14,7 @@ abstract class MutableSettings extends AbsSettings {
   type Setting <: SettingValue
   type BooleanSetting <: Setting { type T = Boolean }
   type IntSetting <: Setting { type T = Int }
+  type MultiStringSetting <: Setting { type T = List[String] }
 
   // basically this is a value which remembers if it's been modified
   trait SettingValue extends AbsSettingValue {
@@ -46,4 +47,4 @@ abstract class MutableSettings extends AbsSettings {
   def XoldPatmat: BooleanSetting
   def XnoPatmatAnalysis: BooleanSetting
   def XfullLubs: BooleanSetting
-}
\ No newline at end of file
+}