deprecates raw tree manipulation facilities in macros.Context
changes some manual tree constructions in macro tests to quasiquotes
Moving disabled tests to their rightful home.

  test/disabled, not test/files/disabled.
Merge pull request #3067 from retronym/ticket/7020-2

Moving disabled tests to their rightful home.
Merge pull request #3047 from xeno-by/topic/deprecate

deprecates raw tree manipulation facilities in macros.Context