Update power mode banner

The classic banner is available under -Dscala.repl.power.banner=classic.

```
scala> :power
Power mode enabled. :phase is at typer.
import scala.tools.nsc._, intp.global._, definitions._
Try :help or completions for vals._ and power._
```

8 files changed, 24 insertions, 40 deletions

diff --git a/test/files/jvm/throws-annot-from-java.check b/test/files/jvm/throws-annot-from-java.check
index ace264a4f5..bf639260e7 100644
--- a/test/files/jvm/throws-annot-from-java.check
+++ b/test/files/jvm/throws-annot-from-java.check
@@ -1,10 +1,8 @@
 
 scala> :power
-** Power User mode enabled - BEEP WHIR GYVE **
-** :phase has been set to 'typer'.          **
-** scala.tools.nsc._ has been imported      **
-** global._, definitions._ also imported    **
-** Try  :help, :vals, power.<tab>           **
+Power mode enabled. :phase is at typer.
+import scala.tools.nsc._, intp.global._, definitions._
+Try :help or completions for vals._ and power._
 
 scala> :paste
 // Entering paste mode (ctrl-D to finish)
diff --git a/test/files/run/class-symbol-contravariant.check b/test/files/run/class-symbol-contravariant.check
index 1d95273b50..5166fce96a 100644
--- a/test/files/run/class-symbol-contravariant.check
+++ b/test/files/run/class-symbol-contravariant.check
@@ -1,10 +1,8 @@
 
 scala> :power
-** Power User mode enabled - BEEP WHIR GYVE **
-** :phase has been set to 'typer'.          **
-** scala.tools.nsc._ has been imported      **
-** global._, definitions._ also imported    **
-** Try  :help, :vals, power.<tab>           **
+Power mode enabled. :phase is at typer.
+import scala.tools.nsc._, intp.global._, definitions._
+Try :help or completions for vals._ and power._
 
 scala> val u = rootMirror.universe
 u: $r.intp.global.type = <global>
diff --git a/test/files/run/constant-type.check b/test/files/run/constant-type.check
index b92f1481a3..9df1353354 100644
--- a/test/files/run/constant-type.check
+++ b/test/files/run/constant-type.check
@@ -1,10 +1,8 @@
 
 scala> :power
-** Power User mode enabled - BEEP WHIR GYVE **
-** :phase has been set to 'typer'.          **
-** scala.tools.nsc._ has been imported      **
-** global._, definitions._ also imported    **
-** Try  :help, :vals, power.<tab>           **
+Power mode enabled. :phase is at typer.
+import scala.tools.nsc._, intp.global._, definitions._
+Try :help or completions for vals._ and power._
 
 scala> val s = transformedType(StringClass.toType).asInstanceOf[Type]
 s: $r.intp.global.Type = String
diff --git a/test/files/run/repl-power.check b/test/files/run/repl-power.check
index 4e030bd9fa..0d4a30b8e3 100644
--- a/test/files/run/repl-power.check
+++ b/test/files/run/repl-power.check
@@ -1,10 +1,8 @@
 
 scala> :power
-** Power User mode enabled - BEEP WHIR GYVE **
-** :phase has been set to 'typer'.          **
-** scala.tools.nsc._ has been imported      **
-** global._, definitions._ also imported    **
-** Try  :help, :vals, power.<tab>           **
+Power mode enabled. :phase is at typer.
+import scala.tools.nsc._, intp.global._, definitions._
+Try :help or completions for vals._ and power._
 
 scala> // guarding against "error: reference to global is ambiguous"
 
diff --git a/test/files/run/t6146b.check b/test/files/run/t6146b.check
index 0e0c216cd7..11149c50fd 100644
--- a/test/files/run/t6146b.check
+++ b/test/files/run/t6146b.check
@@ -4,11 +4,9 @@ It would fail on the following inputs: S2(), S3()
                        ^
 
 scala> :power
-** Power User mode enabled - BEEP WHIR GYVE **
-** :phase has been set to 'typer'.          **
-** scala.tools.nsc._ has been imported      **
-** global._, definitions._ also imported    **
-** Try  :help, :vals, power.<tab>           **
+Power mode enabled. :phase is at typer.
+import scala.tools.nsc._, intp.global._, definitions._
+Try :help or completions for vals._ and power._
 
 scala> val u = rootMirror.universe; import u._, language._
 u: $r.intp.global.type = <global>
diff --git a/test/files/run/t6439.check b/test/files/run/t6439.check
index eee2da1b12..dd7ba9f81d 100644
--- a/test/files/run/t6439.check
+++ b/test/files/run/t6439.check
@@ -48,11 +48,9 @@ scala> type F = Int // no warn
 defined type alias F
 
 scala> :power
-** Power User mode enabled - BEEP WHIR GYVE **
-** :phase has been set to 'typer'.          **
-** scala.tools.nsc._ has been imported      **
-** global._, definitions._ also imported    **
-** Try  :help, :vals, power.<tab>           **
+Power mode enabled. :phase is at typer.
+import scala.tools.nsc._, intp.global._, definitions._
+Try :help or completions for vals._ and power._
 
 scala> object lookup {
   import intp._
diff --git a/test/files/run/t7747-repl.check b/test/files/run/t7747-repl.check
index 487daf4878..d698ea668d 100644
--- a/test/files/run/t7747-repl.check
+++ b/test/files/run/t7747-repl.check
@@ -295,11 +295,9 @@ scala> b(a)
 res4: String = Found Sum
 
 scala> :power
-** Power User mode enabled - BEEP WHIR GYVE **
-** :phase has been set to 'typer'.          **
-** scala.tools.nsc._ has been imported      **
-** global._, definitions._ also imported    **
-** Try  :help, :vals, power.<tab>           **
+Power mode enabled. :phase is at typer.
+import scala.tools.nsc._, intp.global._, definitions._
+Try :help or completions for vals._ and power._
 
 scala> intp.lastRequest
 res5: $r.intp.Request = Request(line=def $ires3 = intp.global, 1 trees)
diff --git a/test/files/run/tpeCache-tyconCache.check b/test/files/run/tpeCache-tyconCache.check
index ac13d32f91..b26f1ab8a1 100644
--- a/test/files/run/tpeCache-tyconCache.check
+++ b/test/files/run/tpeCache-tyconCache.check
@@ -1,10 +1,8 @@
 
 scala> :power
-** Power User mode enabled - BEEP WHIR GYVE **
-** :phase has been set to 'typer'.          **
-** scala.tools.nsc._ has been imported      **
-** global._, definitions._ also imported    **
-** Try  :help, :vals, power.<tab>           **
+Power mode enabled. :phase is at typer.
+import scala.tools.nsc._, intp.global._, definitions._
+Try :help or completions for vals._ and power._
 
 scala>