tests: stabilize the sorted output of list-tree.py on Windows
The test-largefiles-misc.t test was moving 'dir2\' before 'dir\' because while
'/' precedes most of the printable ASCII characters, '\' comes after numbers and
capital letters, among other symbols.
{
"conduit_uri": "https://phab.mercurial-scm.org/api",
"repository.callsign": "HG",
"arc.land.onto.default": "@",
"base": "hg:.^"
}