It's actually a feature that <kbd>Ctrl+D</kbd> duplicates whole lines when more than one is selected. Your first before/after duplicating exactly one line is also expected, because you actually only selected 1 whole line, nothing on the next. You selected `ABC\n` (e.g. the line contents and the line ending character), so only 1 line, hence it duplicates that line only. In your first example it duplicated the 2 lines because you selected more than one line.
If there is a bug here, it is that when a line doesn't end with a newline (like in your first unexpected example) it doesn't add such a new line and simply duplicates the range (missing the newline), leading to the lines combining as in your example. This does not happen if there's a newline character at the end of the line. --- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/geany/geany/issues/1075#issuecomment-226508846
