fix spy {x,y}flip

[t-bltg]

Fix #373.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.75%. Comparing base (e09475b) to head (6585434).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #374      +/-   ##
==========================================
- Coverage   99.75%   99.75%   -0.01%     
==========================================
  Files          36       36              
  Lines        2082     2078       -4     
==========================================
- Hits         2077     2073       -4     
  Misses          5        5              

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