[libreoffice-users] Multiple newlines

Documents archived in Project Gutenberg are typically simple text, with each line ending in <CR><LF> (Hex:0D0A), so that 
paragraphs are separated by an empty line <CR><LF><CR><LF>. I thought it would be simple to convert one such 
(5657.txt) to format in Writer, but stumbled on elementary problems in Find-&-Replace [Ctrl-H] using regular expressions:

        (1) "\n" is not found. Should not "\n" match one of the codes in <CR><LF>? [If not, what code(s) 
should "\n" match?]

        (2) Although "$" is found (matches to <CR><LF>), "$$" (for successive occurrences of 
<CR><LF>) is not found. Why?

        (3) Doing Find "$" & Replace with " " (single space), <CR><LF> is replaced by " " (single 
space). However,
            doing Find "$" & Replace with "@" (single @char), <CR><LF> is replaced by "@@" (double 
@char).  Why?

John

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