/*
ARG_SETS: -revert=?
ARG_SETS: -revert=h
TEST_OUTPUT:
----
Revertable language changes listed by -revert=name:
  =all              Enables all available revertable language changes
  =dip25            revert DIP25 changes https://github.com/dlang/DIPs/blob/master/DIPs/archive/DIP25.md
  =markdown         disable Markdown replacements in Ddoc
----
*/
