Update syntax in CompletionTest

Tests no longer pass as a result

Author: Sporarum

language-server/test/dotty/tools/languageserver/CompletionTest.scala

@@ -610,7 +610,7 @@ class CompletionTest {
     code"""object Foo
           |extension (foo: Foo.type) def xxxx[A]: Int = 1
           |object Main { Foo.xx${m1} }""".withSource
-      .completion(m1, Set(("xxxx", Method, "[A] => Int")))
+      .completion(m1, Set(("xxxx", Method, "[A]: Int")))
   }
 
   @Test def completeExtensionMethodWithParameterAndTypeParameter: Unit = {
@@ -729,7 +729,7 @@ class CompletionTest {
           |given Baz with {}
           |extension [A](using bar: Bar)(a: A)(using baz: Baz) def xxxx[B]: Either[A, B] = Left(a)
           |object Main { 123.xx${m1} }""".withSource
-      .completion(m1, Set(("xxxx", Method, "(using baz: Baz): [B] => Either[Int, B]")))
+      .completion(m1, Set(("xxxx", Method, "(using baz: Baz)[B]: Either[Int, B]")))
   }
 
   @Test def completeExtensionMethodWithTypeBounds: Unit = {
@@ -739,7 +739,7 @@ class CompletionTest {
           |extension [A >: Bar](a: A) def xxxx[B <: a.type]: Either[A, B] = Left(a)
           |val foo = new Foo {}
           |object Main { foo.xx${m1} }""".withSource
-          .completion(m1, Set(("xxxx", Method, "[B <: (foo : Foo)] => Either[Foo, B]")))
+          .completion(m1, Set(("xxxx", Method, "[B <: (foo : Foo)]: Either[Foo, B]")))
   }
 
   @Test def completeInheritedExtensionMethod: Unit = {