tests: stabilize `test-split-legacy-inline-changelog.t` on Windows
The `tar` command is unable to process "C:\path\to\foo.tar" style paths, which
is how `$TESTDIR` is constructed. It also didn't work with
`$TESTDIR_FORWARD_SLASH`- both failed with:
tar: Cannot connect to C: resolve failed
[128]
But `cat` can handle it if the path is quoted, and `tar` can read from stdin.
$ hg init repo
$ cd repo
$ echo This is file a1 > a
$ hg add a
$ hg commit -m "commit #0"
$ ls -A
.hg
a
$ echo This is file b1 > b
$ hg add b
$ hg commit -m "commit #1"
$ hg co 0
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
B should disappear
$ ls -A
.hg
a