Typo

Author: wizawu

README.md

@@ -659,8 +659,7 @@ Creates a SourceNode from generated code and a SourceMapConsumer.
 
 ```js
 const consumer = await new SourceMapConsumer(fs.readFileSync("path/to/my-file.js.map", "utf8"));
-onst node = SourceNode.fromStringWithSourceMap(fs.readFileSync("path/to/my-file.js"),
-                                               consumer);
+const node = SourceNode.fromStringWithSourceMap(fs.readFileSync("path/to/my-file.js"), consumer);
 ```
 
 #### SourceNode.prototype.add(chunk)