[rfbgo]

There was an accidental regression and this no longer works:

    ramble workspace manage experiments gromacs --wf water_bare -i

immediately dies with:

    AttributeError: 'generator' object has no attribute 'variables'

Adds the missing test to prevent the break in the future

[ramble-project-pr-bot]

Ramble Performance Test Metrics

Results produced with commit: a723b99

Test Name	Outcome	Duration (s)	Most Recent Run (s)	Last 5 Avg (s)
test_analyze_large_file	passed	0.3646	0.3629 (f13ee91)	0.3654
test_large_template_expansion	passed	1.0628	1.0707 (f13ee91)	1.2150
test_many_experiments	passed	17.3281	17.2929 (f13ee91)	17.1959
test_many_objects_defaults	passed	13.0662	13.0835 (f13ee91)	12.9160
test_matrix_filter_perf	passed	0.9023	0.9036 (f13ee91)	0.8931

[codecov]

Codecov Report

❌ Patch coverage is 95.89041% with 3 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
lib/ramble/ramble/workspace/workspace.py	91.89%	3 Missing ⚠️

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