Fix jacobian_sparsity for inplace function

[ErikQQY]

Fix #222

I'm not sure if the test case is good, gonna need some advice.

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.91%. Comparing base (c4b1ede) to head (3c12d2d).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #223      +/-   ##
==========================================
+ Coverage   93.87%   93.91%   +0.03%     
==========================================
  Files          30       30              
  Lines        1159     1166       +7     
==========================================
+ Hits         1088     1095       +7     
  Misses         71       71              

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