[issue17920] Documentation: "complete ordering" should be "total ordering"

[abcdef]

abcdef added the comment:

Another small thing: "For example, any two disjoint sets are not equal and are not subsets of each other, so all of the following return False: a<b, a==b, or a>b." It should be "any two nonempty disjoint sets".

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17920>
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