Fix bugs in linop.optics

[bwohlberg]

• fix bugs in linop.optics
• add tests for methods that were broken
• rename method check_sampling to adequate_sampling

[codecov]

Codecov Report

Merging #131 (b0c36c4) into main (0dc831d) will increase coverage by 0.52%.
The diff coverage is 100.00%.

❗ Current head b0c36c4 differs from pull request most recent head 4f1c531. Consider uploading reports for the commit 4f1c531 to get more accurate results

@@            Coverage Diff             @@
##             main     #131      +/-   ##
==========================================
+ Coverage   91.34%   91.86%   +0.52%     
==========================================
  Files          47       46       -1     
  Lines        3223     3208      -15     
==========================================
+ Hits         2944     2947       +3     
+ Misses        279      261      -18     

Flag	Coverage Δ
unittests	91.86% <100.00%> (+0.52%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
scico/linop/optics.py	95.72% <100.00%> (+14.42%)	⬆️
scico/optimize/admm.py
scico/optimize/_ladmm.py
scico/optimize/pgm.py
scico/optimize/_primaldual.py
scico/optimize/__init__.py
scico/pgm.py	94.81% <0.00%> (ø)
scico/admm.py	95.21% <0.00%> (ø)
scico/primaldual.py	98.68% <0.00%> (ø)
scico/ladmm.py	97.64% <0.00%> (ø)
... and 1 more

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[lukepfister]

lgtm!