Document open-the-copy functionality for Save a Copy As

[alankilborn]

new (second) bullet point text:

Normally during execution of this command, the new file created is not opened into a Notepad++ editing tab. To open the new file as part of the process, hold down the Shift key while pressing the Save button in the SaveAs dialog.

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typo in first bullet point text: back should be backup?:

"The new file will be saved, but Notepad++ will continue to work with the document associated with the original filename. So this action effectively creates a backup of the file, but allows you to continue working with the previous file, whereas Save As uses the original as the back and allows you to keep working with the new file."

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refs:

• https://github.com/notepad-plus-plus/notepad-plus-plus/commit/bfe27cc8602d510abc9dc12545dadae432614bd6
• https://github.com/notepad-plus-plus/notepad-plus-plus/pull/15476
• https://github.com/notepad-plus-plus/notepad-plus-plus/issues/11861

[pryrt]

I'll fix the typo now. I've fixed the typo.

I'll hold off on the new functionality until the RC is announced.