I've been searching and found this question... How to copy multi-line text from Excel without quotes? ...which is almost exactly the opposite problem I have.
I am using LibreOffice Calc and I have created a small spreadsheet in which some cell have multi line text.
I would like to copy the whole spreadsheet and paste it into a website. The website requires that multi-line cells have quoted text but I can't get it to quote the text when I copy/paste.
I have tried saving the document as a CSV file and that does quote the text but I am using Japanese kana in the document and can't get the encoding to work.
Edit
OK, after further searching I have found this thread... https://bugs.documentfoundation.org/show_bug.cgi?id=113571
It appears to show a fix for this problem (sort of). The fix applied seems to accommodate both quoted and unquoted multi line cells.
It has an... option? setting? ... SotClipboardFormatId::STRING_TSVC that will allow it to quote multi line text cells.
I just don't know where to set this to turn it on.
I'm running LibreOffice 6.1.2.1 and this fix was pushed to master for 6.0 so it looks like I should be able to access it.
Side note
In the end I gave up and installed Microsoft Office and Excel. That worked fine. Would still be interested to find out how I can do this with LibreOffice though.