Fix "missing function" exception by replacing "set_settings" calls with "set_setting" calls

[FluffySpectre]

I couldn’t get the plugin to work in Godot on MacOS because the set_settings method is not available. I replaced all occurrences with set_setting, and now it works.

Tested with Godot 4.3 and 4.4 RC3 on MacOS.

[gemini-code-assist]

Hello @FluffySpectre, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

Summary of Changes

This pull request addresses an issue where the set_settings method was causing exceptions in Godot on MacOS. The author, FluffySpectre, has replaced all instances of set_settings with set_setting, resolving the compatibility problem. The changes were tested on Godot 4.3 and 4.4 RC3 on MacOS.

Highlights

• Bug Fix: Replaces set_settings with set_setting to avoid exceptions on MacOS.
• Compatibility: Ensures the plugin works correctly on Godot 4.3 and 4.4 RC3 on MacOS.

Changelog

• addons/diff-margin/plugin.gd
  • Replaced all occurrences of editor_settings.set_settings with editor_settings.set_setting on lines 33, 36, 39, 42, and 45.

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[gemini-code-assist]

Code Review

The pull request addresses an issue where the set_settings method was not available, causing the plugin to fail on MacOS. The change replaces all occurrences of set_settings with set_setting, resolving the problem. The author has tested the fix on Godot 4.3 and 4.4 RC3 on MacOS.

Merge Readiness

The pull request appears to correctly address the reported issue. Given the author's testing and the straightforward nature of the fix, the changes seem appropriate for merging. However, since I am unable to directly approve the pull request, it is recommended that other reviewers also examine the changes before merging. There are no comments to block merging.