This is needed to allow us excluding some transitive dependencies from repository libraries (see IDEA-193045).

This is needed to debug issues like IDEA-198383.

Vitaly Provodin

The problem was actually fixed in 5a8e6d64

Matcher and ResultSet mutating methods are annotated; special handling of ResultSet removed
Fixes IDEA-186759 "assert matcher.matches()" should produce a warning about potential side effect

drop old format of before run tasks in Ant — 9 years is enough to convert old project to a new IDEA format

The action paints tool bar buttons and menus based on statistics;