chore(text-restrictions): update line breaks test cases

[yunsii]

Refine test cases for line break rules.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.77%. Comparing base (c3ef70c) to head (220c7e9).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #103   +/-   ##
=======================================
  Coverage   97.77%   97.77%           
=======================================
  Files          10       10           
  Lines         494      494           
  Branches      154      154           
=======================================
  Hits          483      483           
  Misses         11       11           

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