i18n: use util.pconvert() instead of 'str.replace()' for problematic encoding
some problematic encodings use backslash as part of multi-byte characters.
util.pconvert() can treat strings in such encodings correctly, if
win32mbcs is enabled, but str.replace() can not.
basic test for hg debugrebuildstate
$ hg init repo
$ cd repo
$ touch foo bar
$ hg ci -Am 'add foo bar'
adding bar
adding foo
$ touch baz
$ hg add baz
$ hg rm bar
$ hg debugrebuildstate
state dump after
$ hg debugstate --nodates | sort
n 644 -1 bar
n 644 -1 foo
status
$ hg st -A
! bar
? baz
C foo