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Highlights duplicate lines in the active open note. Hovering over a highlighted line will show a tooltip with the line number where it is duplicated.

Also, a notice is shown when pasting new lines that are already duplicates of existing lines in the file.
Motivation
When using obsidian notes to keep track of items, such as web links. I often don't know if the item I'm about to add already exists, and end up duplicating the same item multiple times, this plugin helps prevent this.
Possible future improvements:
- Detect duplicate links, instead of lines.
- Settings for excluding / including files and folders.
- Detect duplicates across different files (in-editor or in a dedicated view).
- Add command / shortcut to go to next occurrence of duplication.