tests/test-debugrename.t

revset: use decorator to mark a predicate as safe

Using decorator can localize changes for adding (or removing) a "safe"
revset predicate function in source code.

To avoid accidentaly treating unsuitable predicates as safe, this
patch uses False as default value of "safe" argument. This forces safe
predicates to be decorated with explicit 'safe=True'.

  $ hg init
  $ echo a > a
  $ hg ci -Am t
  adding a

  $ hg mv a b
  $ hg ci -Am t1
  $ hg debugrename b
  b renamed from a:b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3

  $ hg mv b a
  $ hg ci -Am t2
  $ hg debugrename a
  a renamed from b:37d9b5d994eab34eda9c16b195ace52c7b129980

  $ hg debugrename --rev 1 b
  b renamed from a:b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3