@b4n approved this pull request.
Apart perhaps finding better wording for the documentation, works well and does what it promises.
@@ -3624,6 +3624,12 @@ Reflow lines/block Reformat selected line
breaking lines at the long line marker or the line breaking column if line breaking is enabled for the current document. + +Join Lines If no selection, remove line endings and indentation + after the current line until the end of the current + (indented) text block.
I'm not sure if this is entirely clear that it means "the block of lines at the current indentation level, separated by blank lines (indented or not)".