Operator equals

[tautschnig]

• Each commit message has a non-empty body, explaining why the change was made.
• Methods or procedures I have added are documented, following the guidelines provided in CODING_STANDARD.md.
• n/a The feature or user visible behaviour I have added or modified has been documented in the User Guide in doc/cprover-manual/
• Regression or unit tests are included, or existing tests cover the modified code (in this case I have detailed which ones those are in the commit message).
• n/a My commit message includes data points confirming performance improvements (if claimed).
• My PR is restricted to a single feature or bugfix.
• n/a White-space or formatting changes outside the feature-related changed lines are in commits of their own.

[codecov]

Codecov Report

Attention: Patch coverage is 76.99115% with 78 lines in your changes missing coverage. Please review.

Project coverage is 80.39%. Comparing base (48490fb) to head (3179414).

Files with missing lines	Patch %	Lines
src/util/std_expr.cpp	73.33%	20 Missing ⚠️
src/analyses/custom_bitvector_analysis.cpp	0.00%	5 Missing ⚠️
src/analyses/invariant_set.cpp	0.00%	5 Missing ⚠️
src/goto-instrument/goto_program2code.cpp	68.75%	5 Missing ⚠️
src/goto-checker/counterexample_beautification.cpp	0.00%	3 Missing ⚠️
src/goto-instrument/dot.cpp	0.00%	3 Missing ⚠️
src/analyses/goto_rw.cpp	50.00%	2 Missing ⚠️
src/analyses/interval_analysis.cpp	0.00%	2 Missing ⚠️
src/cpp/expr2cpp.cpp	0.00%	2 Missing ⚠️
src/goto-checker/goto_symex_fault_localizer.cpp	0.00%	2 Missing ⚠️
... and 21 more

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #8675      +/-   ##
===========================================
- Coverage    80.39%   80.39%   -0.01%     
===========================================
  Files         1688     1688              
  Lines       207387   207415      +28     
  Branches        73       73              
===========================================
+ Hits        166731   166742      +11     
- Misses       40656    40673      +17     

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