refactor: omit unnecessary reassignment

[rifeplight]

Overview

Inspired by #2584 and replace all case.

The new version of Go has been optimized, and variables do not need to be reassigned.

For more info: https://tip.golang.org/wiki/LoopvarExperiment#does-this-mean-i-dont-have-to-write-x--x-in-my-loops-anymore

[gemini-code-assist]

Summary of Changes

Hello @rifeplight, 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!

This pull request focuses on refactoring Go code by eliminating redundant variable reassignments within for loops. This change is motivated by recent Go compiler optimizations that resolve the 'loop variable capture' problem, making the explicit reassignment pattern (x := x) obsolete. The update improves code readability and aligns the codebase with current Go best practices.

Highlights

• Refactoring: Removed unnecessary variable reassignments (e.g., tt := tt) within for loops in Go test files. This practice is no longer required due to recent Go compiler optimizations that address the 'loop variable capture' issue.
• Code Modernization: The changes leverage modern Go language features, making the code cleaner and more concise by omitting redundant assignments.

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[gemini-code-assist]

Code Review

This pull request correctly removes unnecessary variable reassignments (tt := tt) within for loops in the test file. This change is aligned with modern Go practices, as Go 1.22 and later versions handle loop variable capturing differently, making this shadowing technique obsolete. The refactoring improves code readability by removing boilerplate. The changes are sound and I have no further suggestions.