tree dc0263f3d3719d54ccfe8706f8bac47636f4d7da
parent ab3beb0f1673c5cab43e36db4ea73c2613100e69
author Joe Tsai <joetsai@digital-static.net> 1513893478 -0800
committer GitHub <noreply@github.com> 1513893478 -0800
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Document that Equal is called even if x or y is nil (#63)