The pattern matching codes “|L” and “|N” match the “newline” character(s) Carriage-Return and/or Line-Feed depending upon the current file type. More info on Pattern Matching Codes
When CONFIG > File handling > File type is set to “0” (Windows/DOS text file), they match a Carriage-Return and Line-Feed as the “newline” characters. When set to “2” (Mac text file) they match a single Carriage- Return character. Otherwise, they match a single “Line-Feed” character.
“|L”and “|N” are similar, but not identical. For file type “0” (Windows/DOS text), “|L” treats a Carriage-Return as optional, while “|N” requires both a Carriage-Return and Line-Feed. Therefore, “|L” is preferred in search strings because it handles Windows/DOS text files that might be missing some Carriage-Returns. For other file types, “|L” and “|N” are identical.