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README.md

@@ -21,7 +21,7 @@ Commonly, [`.slice`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Ref
 ```js
 // removePrefix
 let str = 'greninja'
-str.slice('gren'.length - 1)
+str.slice('gre'.length)
 // => ninja
 
 // removeSuffix