Doc-tool: Remove @sourcefile annotation

The `@sourcefile` annotation is added to symbols when they're unpickled
from TASTY, and we need to remove them so that they do not appear when
generating the documentation.

doc-tool/src/dotty/tools/dottydoc/model/factories.scala

@@ -1,19 +1,13 @@
 package dotty.tools.dottydoc
 package model
 
-import comment._
 import references._
 import dotty.tools.dotc
 import dotc.core.Types
 import Types._
-import dotc.core.TypeApplications._
 import dotc.core.Contexts.Context
 import dotc.core.Symbols.{ Symbol, ClassSymbol }
 import dotty.tools.dotc.core.SymDenotations._
-import dotty.tools.dotc.config.Printers.dottydoc
-import dotty.tools.dotc.core.Names.TypeName
-import dotc.ast.Trees._
-import dotc.core.StdNames._
 
 import scala.annotation.tailrec
 
@@ -42,7 +36,9 @@ object factories {
   }
 
   def annotations(sym: Symbol)(implicit ctx: Context): List[String] =
-    sym.annotations.map(_.symbol.showFullName)
+    sym.annotations.collect {
+      case ann if ann.symbol != ctx.definitions.SourceFileAnnot => ann.symbol.showFullName
+    }
 
   private val product = """Product[1-9][0-9]*""".r
 

doc-tool/test/PackageStructure.scala

@@ -3,14 +3,35 @@ package dottydoc
 
 import org.junit.Test
 import org.junit.Assert._
-
 import dotc.util.SourceFile
+import model.Trait
 import model.internal._
 
 class PackageStructureFromSourceTest extends PackageStructureBase with CheckFromSource
 class PackageStructureFromTastyTest extends PackageStructureBase with CheckFromTasty
 
 abstract class PackageStructureBase extends DottyDocTest {
+
+  @Test def sourceFileAnnotIsStripped = {
+    val source = new SourceFile(
+      "A.scala",
+      """package scala
+        |
+        |/** Some doc */
+        |trait A
+      """.stripMargin
+    )
+
+    val className = "scala.A"
+
+    check(className :: Nil, source :: Nil) { (ctx, packages) =>
+      packages("scala") match {
+        case PackageImpl(_, _, _, List(trt: Trait), _, _, _, _) =>
+          assert(trt.annotations.isEmpty)
+      }
+    }
+  }
+
   @Test def multipleCompilationUnits = {
     val source1 = new SourceFile(
       "TraitA.scala",