Commitcb3ab4c

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Add String::isEmpty()

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Original file line number	Diff line number	Diff line change
`@@ -89,6 +89,7 @@ class String`
`89`	`89`	`// invalid string (i.e., "if (s)" will be true afterwards)`
`90`	`90`	`boolreserve(unsignedint size);`
`91`	`91`	`inlineunsignedintlength(void)const {return len;}`
	`92`	`+inlineboolisEmpty(void)const {returnlength() ==0; }`
`92`	`93`
`93`	`94`	`// creates a copy of the assigned value. if the value is null or`
`94`	`95`	`// invalid, or if the memory allocation fails, the string will be`

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