Add copy() method for DiffractionObject

[bobleesj]

Closes#201 - add copy() for DiffracitonObject

[bobleesj]

Utilzing the object's __eq__ nice implementation

[sbillinge]

To complete this test also assert id(actual) != Id(initial)

[sbillinge]

Then the copy is not pointing to the same object

[bobleesj]

yes done below.

[bobleesj]

@sbillinge ready for review

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.54%. Comparing base (08de7c9) to head (ca0ef30).
Report is 9 commits behind head on main.

Additional details and impacted files

@@ Coverage Diff @@## main #204 +/- ##
==========================================
+ Coverage 96.49% 96.54% +0.05% 
==========================================
Files 8 8 Lines 342 347 +5 ==========================================
+ Hits 330 335 +5 
Misses 12 12 

Files with missing lines	Coverage Δ
tests/test_diffraction_objects.py	88.42% <100.00%> (+0.64%)	⬆️

[sbillinge]

Pls see inline

[sbillinge]

To complete this test also assert id(actual) != Id(initial)

[sbillinge]

Then the copy is not pointing to the same object

[bobleesj]

@sbillinge Right! Thank you. Additional test added.

[bobleesj]

@sbillinge ready for review - just enhanced the variable name from copy_of_DO to do_copy for consistency.

[sbillinge]

@bobleesj not sure why codecov is complaining here...diffpy has a global org secret token. Maybe it is being flaky. I will just try and rerun it? after than an empty commit?

[bobleesj]

Codecov looks okay to me in fact 0.05% has gone up! @sbillinge

[sbillinge]

Codecov looks okay to me in fact 0.05% has gone up! @sbillinge

it failed to upload so failed. I reran it and it uploaded and passed..... CC is officially flaky....