dirstate: fix some problems for recursive case normalization (
issue3342)
file in nested directory causes unexpected abort.
problems below should be fixed for recursive normalization route in
dirstate._normalize():
1. rsplit() may cause unpacking into more than 2 elements.
it should be called with 'maxsplit' argument to unpack
into 'd, f'
2. 'd' is replaced by normalized value prefixed with
'self._root', but this makes 'folded' as absolute path,
and it is unexpected one for caller of recursive
normalization
$ hg init
$ echo 0 > a
$ echo 0 > b
$ hg ci -A -m m
adding a
adding b
$ hg rm a
$ hg cat a
0
$ hg cat --decode a # more tests in test-encode
0
$ echo 1 > b
$ hg ci -m m
$ echo 2 > b
$ hg cat -r 0 a
0
$ hg cat -r 0 b
0
$ hg cat -r 1 a
a: no such file in rev 7040230c159c
[1]
$ hg cat -r 1 b
1