Fix generation of unwanted parquet file in doctest

[OmBiradar]

Change Description

Closes #467

Solution Description

Adds # doctest: +SKIP to the function to_parquet of the NestedFrame class.

This doesn't affect the test itself, it just ignores the test and assumes that it works.

Code Quality

• I have read the Contribution Guide and agree to the Code of Conduct
• My code follows the code style of this project
• My code builds (or compiles) cleanly without any errors or warnings
• My code contains relevant comments and necessary documentation

[OmBiradar]

See also #454 (comment)

[hombit]

Thank you

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.30%. Comparing base (1f834d0) to head (78ee7ec).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #468   +/-   ##
=======================================
  Coverage   97.30%   97.30%           
=======================================
  Files          19       19           
  Lines        2156     2156           
=======================================
  Hits         2098     2098           
  Misses         58       58           

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[github-actions]

Before [1f834d0]	After [0b2e261]	Ratio	Benchmark (Parameter)
560±200ms	582±200ms	1.04	benchmarks.ReadFewColumnsHTTPS.time_run
659±5ms	687±400ms	1.04	benchmarks.ReadFewColumnsS3.time_run
49.5±1ms	51.0±2ms	1.03	benchmarks.ReassignHalfOfNestedSeries.time_run
10.6±0.3ms	10.9±0.1ms	1.02	benchmarks.NestedFrameQuery.time_run
29.2±1ms	29.6±2ms	1.01	benchmarks.AssignSingleDfToNestedSeries.time_run
105M	105M	1	benchmarks.NestedFrameAddNested.peakmem_run
110M	110M	1	benchmarks.NestedFrameQuery.peakmem_run
109M	108M	1	benchmarks.NestedFrameReduce.peakmem_run
1.23±0.01ms	1.23±0.01ms	1	benchmarks.NestedFrameReduce.time_run
180M	180M	1	benchmarks.ReadFewColumnsHTTPS.peakmem_run

Click here to view all benchmarks.