emacs-iedit

This package includes Emacs minor modes (iedit-mode and iedit-rectangle-mode) based on an API library (iedit-lib) and allows you to alter one occurrence of some text in a buffer (possibly narrowed) or region, and simultaneously have other occurrences changed in the same way, with visual feedback as you type. iedit-mode is a great alternative to built-in replace commands: - A more intuitive way to alter all the occurrences at once - Visual feedback - Fewer keystrokes in most cases - Optionally preserve case

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