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Original file line number	Diff line number	Diff line change
@@ -342,7 +342,6 @@ In the code above, the property `obj.test` technically exists. So the `in` opera
`342`	`342`	Situations like this happen very rarely, because `undefined` is usually not assigned. We mostly use `null` for "unknown" or "empty" values. So the `in` operator is an exotic guest in the code.
`343`	`343`	````
`344`	`344`
`345`		`-`
`346`	`345`	`## The "for..in" loop`
`347`	`346`
`348`	`347`	To walk over all keys of an object, there exists a special form of the loop: `for..in`. This is a completely different thing from the `for(;;)` construct that we studied before.
@@ -531,7 +530,7 @@ The equality `==` and strict equality `===` operators for objects work exactly t
`531`	`530`
`532`	`531`	`Two objects are equal only if they are the same object.`
`533`	`532`
`534`		`-For instance, two variables reference the same object, they are equal:`
	`533`	`+For instance, if two variables reference the same object, they are equal:`
`535`	`534`
`536`	`535`	```js run
`537`	`536`	`let a = {};`

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