PO translator comments must begin with # and space

[mlocati]

Describe the bug

The .po files downloaded from Transifex start with some translator comments, for example:

# 
# Translators:
# Translator 1, 2024
# Translator 2, 2024
# 
msgid ""
msgstr ""

Please remark that the first and the 5th lines contain a # comment followed by a space (# ) and not just a #
When lingui reads and updates such .po files, the trailing space is stripped out (that is, the lines # become #).

As per the gettext specs, translator comments always start with a # followed by a space:

There are two kinds of comments: those which have some white space immediately following the # - the translator comments -
[...]

So, lingui should keep those trailing spaces

To Reproduce

1. generate a .po file with lingui extract
2. add an empty translator comment (# followed by a space)
3. run lingui extract again
4. The line with the empty translator comment will become a # NOT followed by a space

Expected behavior

Lines # should still be # and not # when lingui regenerates them.

[timofei-iatsenko]

Thanks for the report. It seems it's an issue in the underlaying pofile library. Another good reason to drop it in favor of own implementation