fix: fix pasting twice in formula editor

[ybzky]

close https://github.com/dream-num/univer-pro/issues/2115

Pull Request Checklist

• Related tickets or issues have been linked in the PR description (or missing issue).
• Naming convention is followed (do please check it especially when you created new plugins, commands and resources).
• Unit tests have been added for the changes (if applicable).
• Breaking changes have been documented (or no breaking changes introduced in this PR).

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Playwright test results

 4 passed

Details

 4 tests across 2 suites
 1 minute, 23 seconds
 29c903a
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Codecov Report

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

Please upload report for BASE (dev@c357724). Learn more about missing BASE report.
Report is 19 commits behind head on dev.

Files with missing lines	Patch %	Lines
...der-controllers/doc-selection-render.controller.ts	0.00%	2 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff           @@
##             dev    #3481   +/-   ##
======================================
  Coverage       ?   30.81%           
======================================
  Files          ?     2158           
  Lines          ?   113232           
  Branches       ?    24838           
======================================
  Hits           ?    34897           
  Misses         ?    78335           
  Partials       ?        0           

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