feat: fix the double quotes caused eval() bug

[tx2002]

fix: #440

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 95.45455% with 1 line in your changes missing coverage. Please review.

Project coverage is 66.86%. Comparing base (8dd4940) to head (060c258).

Files with missing lines	Patch %	Lines
...java/org/casbin/jcasbin/main/InternalEnforcer.java	93.75%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #443      +/-   ##
==========================================
+ Coverage   66.75%   66.86%   +0.11%     
==========================================
  Files          60       60              
  Lines        2966     2976      +10     
  Branches      548      549       +1     
==========================================
+ Hits         1980     1990      +10     
  Misses        809      809              
  Partials      177      177              

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[github-actions]

🎉 This PR is included in version 1.77.0 🎉

The release is available on:

• GitHub release
• v1.77.0

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