narrow: fix copies._fullcopytracing() narrowspec filtering in graft case
I broke this too in
707c3804e607 (narrow: move copies overrides to
core, 2018-09-28). Hopefully I'm done fixing things broken by that
commit now.
Differential Revision: https://phab.mercurial-scm.org/D5213
tests: demonstrate broken copies._fullcopytracing()
Turns out copies._fullcopytracing() was also broken.
Differential Revision: https://phab.mercurial-scm.org/D5212
narrow: make copies.pathcopies() filter with narrowspec again
I broke this in
707c3804e607 (narrow: move copies overrides to core,
2018-09-28).
Differential Revision: https://phab.mercurial-scm.org/D5203