src/Pure/Thy/thy_syntax.scala

       resources: Resources,
       reparse_limit: Int,
       previous: Document.Version,
       doc_blobs: Document.Blobs,
       edits: List[Document.Edit_Text],
-      consolidate: Boolean): Session.Change =
+      consolidate: List[Document.Node.Name]): Session.Change =
   {
     val (syntax_changed, nodes0, doc_edits0) = header_edits(resources, previous, edits)
 
     def get_blob(name: Document.Node.Name) =
       doc_blobs.get(name) orElse previous.nodes(name).get_blob