Does it handle Windows CRLF line endings?

Yes. Both \r\n (Windows) and \n (Unix/Mac) are removed.

What does "collapse spaces" do?

After joining lines, runs of two or more spaces collapse to one. Useful when removing line breaks from indented text.

No — empty lines are dropped when joining, otherwise you would get double separators.

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Remove all line breaks and optionally collapse extra spaces. Replace breaks with a comma, space, or any custom separator.

Input

Replacement

Collapse spacesTrim each line

Output

First line Second line Third line