Improved toolchain to minimize complexity: - better compiler error messages: https://raw.github.com/scala/scala/master/test/files/neg/found-req-variance.check

Improved toolchain to minimize complexity: - better compiler error messages: https://raw.github.com/scala/scala/master/test/files/neg/found-req-variance.check https://raw.github.com/scala/scala/master/test/files/neg/fou... https://issues.scala-lang.org/browse/SI-2388 https://issues.scala-lang.org/browse/SI-2388 https://issues.scala-lang.org/browse/SI-3092 https://issues.scala-lang.org/browse/SI-3092 (unfortunately the JIRA is down now and google didn't really cache them) - compiler warnings, e.g. tupled arguments: https://issues.scala-lang.org/browse/SI-4851 https://issues.scala-lang.org/browse/SI-4851 - implicits: "-Xlog-implicits" switch tell you where they come from (and the IDEA plugin works pretty well on this issue), and explicit return types for implicits: http://groups.google.com/group/scala-internals/browse_frm/thread/8dba26b208f1870b# http://groups.google.com/group/scala-internals/browse_frm/th... - documentation: definitely a lot of work with a "doc czar" appointed.