Commit 740a2df

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Fix typo in 1.2.12

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Original file line number	Diff line number	Diff line change
`@@ -109,7 +109,7 @@ If we assume that zero height is a valid value, that shouldn't be replaced with`
`109`	`109`
`110`	`110`	The precedence of the `??` operator is rather low: `5` in the [MDN table](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence#Table). So `??` is evaluated before `=` and `?`, but after most other operations, such as `+`, `*`.
`111`	`111`
`112`		-So if we'd like to choose a value with `??` an expression with other operators, consider adding parentheses:
	`112`	+So if we'd like to choose a value with `??` in an expression with other operators, consider adding parentheses:
`113`	`113`
`114`	`114`	```js run
`115`	`115`	`let height = null;`

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