fix: remove unexpected space in output format string

[ulivz]

Summary

Improves the autofix for no-unnecessary-type-assertion rule to properly remove whitespace before 'as' keyword, preventing extra spaces in output.

Close: #280

• Before: foo() as number -> foo() ;
• After: foo() as number -> foo();

Edge Case

This Pull Request does not solve an edge case:

• Source:

const foo = (  3 + 5
  ) /*as*/ as //as
  (
    number
  );

• Expected:

const foo = (  3 + 5
  ) /*as*/  //as
;

• Current workaround:

const foo = (  3 + 5
  ) /*as*/;

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[Copilot]

Pull Request Overview

This PR fixes a formatting issue in the autofix functionality of the no-unnecessary-type-assertion rule where extra spaces were being left in the output after removing unnecessary type assertions. The fix ensures that when removing type assertions like foo() as number, the result is properly formatted as foo(); instead of foo() ;.

Key changes:

• Improved whitespace handling in the autofix logic to include preceding spaces when removing 'as' keyword
• Simplified the fix generation to use a single removal range instead of multiple separate fixes
• Updated test expectations to reflect the corrected output format

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
no_unnecessary_type_assertion.go	Enhanced autofix logic to properly handle whitespace removal before 'as' keyword and simplified fix generation
no_unnecessary_type_assertion_test.go	Updated test case expectation to reflect the corrected output format without extra spaces

[ulivz]

Updated: I tested the original issue (#280) locally with the fixed build bin and it was verified to be resolved:

Before

After