Apply suggestions from code review

Co-authored-by: Fengyun Liu <liu@fengy.me>

Author: december32

compiler/src/dotty/tools/repl/ReplDriver.scala

@@ -377,7 +377,7 @@ class ReplDriver(settings: Array[String],
 
     case TypeOf(expr) =>
       expr match {
-        case "" => out.println(s":type <expression>.")
+        case "" => out.println(s":type <expression>")
         case _  =>
           compiler.typeOf(expr)(newRun(state)).fold(
             displayErrors,
@@ -388,7 +388,7 @@ class ReplDriver(settings: Array[String],
 
     case DocOf(expr) =>
       expr match {
-        case "" => out.println(s":doc <expression>.")
+        case "" => out.println(s":doc <expression>")
         case _  =>
           compiler.docOf(expr)(newRun(state)).fold(
             displayErrors,

compiler/test-resources/repl/i9538

@@ -1,5 +1,5 @@
 scala>:type
-:type <expression>.
+:type <expression>
 
 scala>:doc
-:doc <expression>.
+:doc <expression>

compiler/test/dotty/tools/repl/DocTests.scala

@@ -180,7 +180,7 @@ class DocTests extends ReplTest {
   @Test def docOfEmpty =
     fromInitialState { implicit s =>
     run(":doc")
-    assertEquals(":doc <expression>.", storedOutput().trim)
+    assertEquals(":doc <expression>", storedOutput().trim)
   }
 
   private def eval(code: String): State =

compiler/test/dotty/tools/repl/TypeTests.scala

@@ -24,6 +24,6 @@ class TypeTests extends ReplTest {
 
   @Test def typeOfEmpty = fromInitialState { implicit s =>
     run(":type")
-    assertEquals(":type <expression>.", storedOutput().trim)
+    assertEquals(":type <expression>", storedOutput().trim)
   }
 }