D4346: hg: wrap the highest layer in the `hg` script possible in trace event

[durin42 (Augie Fackler)]

durin42 added a comment.


  I think this is ready? Do I owe you anything else on it?

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D4346

To: durin42, #hg-reviewers, indygreg
Cc: indygreg, mercurial-devel