doc: fix typo in docstring of left (#3748)

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Hongyu Ouyang 2024-03-23 00:39:36 -07:00 committed by GitHub
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@ -224,7 +224,7 @@ the first matching constructor, or else fails.
syntax (name := constructor) "constructor" : tactic
/--
Applies the second constructor when
Applies the first constructor when
the goal is an inductive type with exactly two constructors, or fails otherwise.
```
example : True False := by