Fix tab character handling ( if ignore the tab character, do not increment the column number )

[goccy]

fix #675

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.85%. Comparing base (9671363) to head (4cfa363).

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Additional details and impacted files

@@           Coverage Diff           @@
##           master     #676   +/-   ##
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  Coverage   77.84%   77.85%           
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  Files          22       22           
  Lines        7959     7962    +3     
=======================================
+ Hits         6196     6199    +3     
  Misses       1350     1350           
  Partials      413      413           

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[Copilot]

Pull Request Overview

This PR fixes tab character handling so that when a tab is ignored, the column number is not incremented. Key changes include:

• Adding new test cases in parser_test.go to verify correct handling of tab characters.
• Introducing a new progressOnly function in scanner/scanner.go.
• Replacing progressColumn calls with progressOnly in tab-related code paths in scanner/scanner.go to adjust column behavior.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
parser/parser_test.go	New test cases for YAML content with tab characters to verify fix
scanner/scanner.go	Adds progressOnly and updates scan logic to adjust tab character handling

Comments suppressed due to low confidence (2)

scanner/scanner.go:101

• [nitpick] The function name 'progressOnly' is ambiguous—its purpose of selectively updating state (offset without affecting column) is not immediately clear. Consider adding a comment or choosing a more descriptive name to clarify its intent.

func (s *Scanner) progressOnly(ctx *Context, num int) {

scanner/scanner.go:1444

• Replacing progressColumn with progressOnly should avoid incrementing the column number, however, since progressOnly still calls progress (which may update column-related state), please double-check that the column is not inadvertently incremented in these cases.

s.progressOnly(ctx, 1)