I have a list of names:
Kathy Brown
Imogen Brown
Nicola Brown
I want to remove the enter key and have the whole lot in one line, separated by a comma. I could do this on word in search/replace but can’t work out the Libre equivalent.
I am enjoying learning Libre Office very much and would like to thank you for developing it. Hope you can help!
Lesley
Just tested it with LibreOffice V4.4.1.RC2 : The standard ‘Find & Replace’ will now do your job. Obviously the tool was enhanced.
“$” (without the quotation marks) in ‘Search For’
", " (Comma and space) in ‘Replace With’
Options as needed - ‘Replace All’
I haved just created an account to say thanks you 
Within Libreoffice, open “Find & Replace” (Ctrl H), select “Other Options” and enable “Regular Expressions”. You can then search for “\n” (line break) and replace with a comma (or comma space). There’s a very handy extension http://extensions.libreoffice.org/extension-center/alternative-dialog-find-replace-for-writer that simplifies this a bit and adds more functionality.
Revision to my previous answer, \n “in the Search for text box stands for a line break that was inserted with the Shift+Enter key combination” and will NOT find “enter key” paragraph marks. The Alternative Dialog Find & Replace Extension DOES allow searching for and replacing those paragraph marks.