Fix scala3doc code

Author: odersky

sbt-dotty/sbt-test/sbt-dotty/scala3doc/src/main/scala/Conversion.scala

@@ -12,7 +12,7 @@ object Conversion {
 
   def convert[T, U](x: T)(using converter: Conversion[T, U]): U = converter(x)
 
-  given IntWrapperToDoubleWrapper as Conversion[IntWrapper, DoubleWrapper] = new Conversion[IntWrapper, DoubleWrapper] {
+  given IntWrapperToDoubleWrapper: Conversion[IntWrapper, DoubleWrapper] = new Conversion[IntWrapper, DoubleWrapper] {
     override def apply(i: IntWrapper): DoubleWrapper = new DoubleWrapper(i.a.toDouble)
   }
 

sbt-dotty/sbt-test/sbt-dotty/scala3doc/src/main/scala/ImpliedInstances.scala

@@ -20,10 +20,10 @@ object ImpliedInstances {
       override def parse(s: String): Try[A] = f(s)
     }
 
-    given stringParser as StringParser[String] = baseParser(Success(_))
-    given intParser as StringParser[Int] = baseParser(s ⇒ Try(s.toInt))
+    given stringParser: StringParser[String] = baseParser(Success(_))
+    given intParser: StringParser[Int] = baseParser(s ⇒ Try(s.toInt))
 
-    given optionParser[A](using parser: => StringParser[A]) as StringParser[Option[A]] = new StringParser[Option[A]] {
+    given optionParser[A](using parser: => StringParser[A]): StringParser[Option[A]] = new StringParser[Option[A]] {
       override def parse(s: String): Try[Option[A]] = s match {
         case "" ⇒ Success(None) // implicit parser not used.
         case str ⇒ parser.parse(str).map(x ⇒ Some(x)) // implicit parser is evaluated at here