Converter can't handle keys with underscores

[rebeccaalpert]

🐛 Bug Report

It seems like keys can't contain underscores.

To Reproduce

We have a JSON file that contains the following:

"Label name must not begin with a digit and contain only alphanumeric characters or '_'.": "Label name must not begin with a digit and contain only alphanumeric characters or '_'.",

After you run i18nextToPo('ja', fs.readFileSync(file), { language: 'ja', foldLength: 0 }).then( save(...));, you get something like this:

msgctxt "'."
msgid "Label name must not begin with a digit and contain only alphanumeric characters or '"
msgstr ""

Expected behavior

The expected PO file would look like this:

msgid "Label name must not begin with a digit and contain only alphanumeric characters or '_'."
msgstr ""

Your Environment

• runtime version: node 10.16.2
• i18next version: 19.4.3
• os: Mac

[rebeccaalpert]

Posted too soon. I suspect this is due to the default context separator. I'll see if we can switch ours to something else or escape these.