Fix typos: remove duplicate words in comments and documentation

[ruyut]

PR Checklist

• Functionality has been tested, no obvious bugs
• Code style follows project conventions
• Documentation/comments updated (if applicable)

Brief Description of Changes

Please briefly describe the main changes in this PR:

This PR fixes several typos by removing duplicate words in comments and documentation throughout the codebase.

Related Issue (if any)

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Additional Notes

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Summary by Sourcery

Chores:

• Remove duplicate words from inline comments and XML documentation summaries across the codebase.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Fixes minor typos by removing duplicated words in comments and XML documentation, without changing any runtime behavior.

File-Level Changes

Change	Details	Files
Correct duplicated words in documentation comment for busy indicator alignment property.	Update XML documentation summary for BusyVerticalAlignment to remove repeated word in description	QuickLook/Controls/BusyDecorator/BusyDecorator.cs
Fix typo in inline window-positioning comment.	Edit comment in PositionWindow method to remove duplicated word describing maximized state condition	QuickLook/ViewerWindow.Actions.cs

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[Copilot]

Pull request overview

Fixes duplicate-word typos in comments/documentation across QuickLook.

Changes:

• Clean up a duplicated “is” in the app manifest compatibility comment.
• Remove duplicated “now” in ViewerWindow positioning comment.
• Remove duplicated “the” in BusyDecorator XML documentation.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
QuickLook/app.manifest	Updates Windows compatibility comment text to remove duplicated word.
QuickLook/ViewerWindow.Actions.cs	Fixes duplicated word in window positioning comment.
QuickLook/Controls/BusyDecorator/BusyDecorator.cs	Fixes duplicated word in XML doc comment for BusyVerticalAlignment.

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