util: wrap lines with multi-byte characters correctly (issue2943)
This re-introduces the unicode conversion what was lost in d320e70442a5 5 years
ago and had the comment:
To avoid corrupting multi-byte characters in line, we must wrap
a Unicode string instead of a bytestring.
$ hg init repo
$ cd repo
$ touch foo
$ hg ci -Am 'add foo'
adding foo
$ hg up -C null
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
this should be stored as a delta against rev 0
$ echo foo bar baz > foo
$ hg ci -Am 'add foo again'
adding foo
created new head
$ hg debugindex foo
rev offset length base linkrev nodeid p1 p2
0 0 0 0 0 b80de5d13875 000000000000 000000000000
1 0 24 0 1 0376abec49b8 000000000000 000000000000