Update primer.rst - missing show_object(assy)

[bmsleight]

Example does not image without show_object(assy)

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (ff83f99) 94.44% compared to head (e46d42d) 94.44%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1501   +/-   ##
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  Coverage   94.44%   94.44%           
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  Files          28       28           
  Lines        5774     5774           
  Branches     1070     1070           
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  Hits         5453     5453           
  Misses        194      194           
  Partials      127      127           

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[jmwright]

@bmsleight None of the other examples in this section include show_object either. I think the code is just meant to be representative, and could be run in any execution environment (CQ-editor, jupyter-cadquery, etc), requiring different show calls.

[adam-urbanczyk]

Agree with @jmwright - opened https://github.com/CadQuery/CQ-editor/pull/437 to address this for CQ-editor.