Question 1

What counts as an empty line?

Accepted Answer

A line containing zero characters, or a line containing only whitespace (spaces/tabs), depending on the mode selected. Truly blank lines and whitespace-only lines can be handled separately.

Question 2

Can I keep one blank line between paragraphs while removing double blanks?

Accepted Answer

Yes. Use 'collapse multiple blanks' mode: consecutive blank lines are reduced to a single blank line. This normalizes spacing while preserving paragraph separation — a common cleanup task for copy-pasted text.

Question 3

Why do copy-pasted texts often have extra blank lines?

Accepted Answer

Different applications use different line-ending conventions (CRLF on Windows, LF on Unix, CR on old Mac). Pasting across platforms can insert extra line breaks. Word processors also add visual spacing between paragraphs using blank lines rather than CSS margin.

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