fix: the error clip the last char when linebreak

[Jocs]

close #xxx, #yyy, #zzzz

[github-actions]

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📑 Examples	📚 Storybook
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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 31.62%. Comparing base (f24fdb1) to head (18014ed).

Files	Patch %	Lines
...onents/docs/layout/block/paragraph/layout-ruler.ts	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #1745      +/-   ##
==========================================
- Coverage   31.62%   31.62%   -0.01%     
==========================================
  Files        1044     1044              
  Lines       57878    57880       +2     
  Branches    12170    12171       +1     
==========================================
  Hits        18303    18303              
- Misses      39575    39577       +2     

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