fix: cursor position when formatter appends characters on empty string

[pierluigigiancola]

resolve #651

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Name	Status	Preview	Comments	Updated (UTC)
input-number	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 4, 2024 3:21am

[afc163]

Could you add a test case for that?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.28%. Comparing base (98b6025) to head (de85dc0).
Report is 7 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #652      +/-   ##
==========================================
+ Coverage   94.52%   95.28%   +0.76%     
==========================================
  Files           6        6              
  Lines         292      297       +5     
  Branches       76       78       +2     
==========================================
+ Hits          276      283       +7     
+ Misses         16       14       -2     

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[pierluigigiancola]

I revert the fix, add the test case to see it failed and then reapply the fix. If you want clearer git history I can close di PR, rewrite the history and issue a new one with test as first commit and fix as second

Let me know if I should add other tests