Rename combineBonds to combineBond

[jeffry1829]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 62.50000% with 6 lines in your changes missing coverage. Please review.

Project coverage is 16.60%. Comparing base (6c400be) to head (f05f0b6).
Report is 7 commits behind head on dev-master.

Files with missing lines	Patch %	Lines
src/BlockUniTensor.cpp	0.00%	3 Missing ⚠️
include/Bond.hpp	80.00%	0 Missing and 1 partial ⚠️
include/UniTensor.hpp	50.00%	0 Missing and 1 partial ⚠️
src/UniTensor_base.cpp	66.66%	1 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff               @@
##           dev-master     #448      +/-   ##
==============================================
+ Coverage       16.59%   16.60%   +0.01%     
==============================================
  Files             221      221              
  Lines           48469    48483      +14     
  Branches        20266    20269       +3     
==============================================
+ Hits             8042     8051       +9     
- Misses          36138    36141       +3     
- Partials         4289     4291       +2     

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[pcchen]

Please review and merge this.