[Bugfix] Minor fix in builder.py

[LJC00118]

Summary by CodeRabbit

Bug Fixes

• Fixed augmented assignment behavior for local variables to properly return the modified value after in-place operations.

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Walkthrough

The aug_assign function in the builder module now explicitly returns the target variable when performing augmented assignment on local variables. Previously, this code path did not return a value. Buffer and default paths remain unchanged.

Changes

Cohort / File(s)	Change Summary
Augmented Assignment Return tilelang/language/v2/builder.py	Added explicit return of target in aug_assign method when is_var(target) is true; maintains existing behavior for Buffer targets (RuntimeError) and default path (parent implementation delegation)

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

• Verify the return statement is correctly placed after the buffer_store operation
• Confirm this aligns with the expected augmented assignment semantics for local variables
• Check for any downstream code that depends on this function's return value (or lack thereof)

Poem

🐰 A value returned, once lost to the void,
Now hops back from branches we once avoided,
Variables gleaming with clarity bright,
The augmented path shines with new light! ✨

Pre-merge checks and finishing touches

❌ Failed checks (1 warning, 1 inconclusive)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	You can run @coderabbitai generate docstrings to improve docstring coverage.
Title check	❓ Inconclusive	The title '[Bugfix] Minor fix in builder.py' is vague and lacks specificity about the actual change being made.	Replace with a more descriptive title that explains the specific fix, such as '[Bugfix] Return target in aug_assign for local variables' to better convey the change.

✅ Passed checks (1 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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