Propose fix typos and ignore emacs backup files

[jeis4wpi]

Reference issue

What does this implement/fix?

Propose fix typos and ignore emacs backup files

Additional information

CheckList

• [ ] Did you add an unittest for your new example or defect fix?
• [ ] Did you add documents for your new example?
• [ ] All CIs are green? (You can check it after submitting)

[AtsushiSakai]

@codex review

[chatgpt-codex-connector[bot]]

Codex Review: Didn't find any major issues. :+1:

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