tuned Markup_Tree.+ : slightly more expensive version to rebuild rest avoids crash of RedBlack.scala:120 (version Scala 2.8.0), e.g. on the following input: ML {* fun f x = (x + 1, "aaa") *}

tuned;

tuned signature;

simplified Command.status again, reverting most of e5eed57913d0 (note that more complex information can be represented with full markup reports);

proper range for hyperlinks and tooltips, using original markup information;

tuned signature;

misc tuning and simplification;

renamed Markup_Tree.Node to Text.Info; Markup_Tree.select: body may depend on full Text.Info, including range; tuned;

removed obsolete Markup_Tree.flatten/filter;

Isabelle_Hyperlinks: select relevant information directly from Markup_Tree, without intermediate RefInfo;

Document_View.text_area_extension: select relevant information directly from Markup_Tree, without intermediate TypeInfo;

tuned signatures;