3d60f7ad5a
rotate creates cycles in the tree and drops nodes...
This either breaks everything (infinite recursion) or silently
loses data.
Improve the tests to ensure rotate does what it's supposed to do.
This is a partial revert from
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| avl | ||
| splay | ||
| authors.txt | ||
| summary.txt | ||
| tags.txt | ||
| trees-docs.factor | ||
| trees-tests.factor | ||
| trees.factor | ||