[BUG] [ox-odt] ODT export Chinese/Han script inserts unexpected spaces in each consecutive line

[Cantoraz Chou]

Emacs  : GNU Emacs 28.2 (build 1, x86_64-pc-linux-gnu, GTK+ Version
3.24.34, cairo version 1.17.6) of 2022-09-12
Package: Org mode version 9.6

This commit 
[[https://git.savannah.gnu.org/cgit/emacs/org-mode.git/commit/?id=3502ce2dbb29b70cdbb978d144322d48cb00f26d][ox-odt:
Fix newlines replaced by spaces in Han script]]
brings in a strange bug.

Exporting ODT produces an unexpected space inserted into each line.

Eg, the simplest code (a consecutive line conposed of two contiguous lines)

#+begin_src org
那时，天下人的口音、言语都是一样。
那时，天下人的口音、言语都是一样。
#+end_src

will produce following text:

#+begin_example
那时，天下人的口音、言语都是一样。那 时，天下人的口音、言语都是一样。
#+end_example

Notice the second sentence, the space in `那 时'.

The space seems to be inserted randomly. With more detailed example
(provided as attachment), I find that only one space were inserted into
each consecutive line, at nearly middle of the whole line.

If I manually change the code of this commit back to previous
implementation, these unexpected spaces disappear.

Screenshot_20230112_103905.png
Description: PNG image

example.org
Description: Binary data