Update README.md (#209)

ooookai · web-flow · commit eec8aa74819f · 2020-10-20T05:14:35.000+02:00
extra `(`
diff --git a/README.md b/README.md
@@ -140,7 +140,7 @@ function log() { console.log(arguments); }
 p.require(factorial)
 
 // Approximate e^10
-p.map((n => Math.pow(10, n)).reduce(add).then(log);
+p.map(n => Math.pow(10, n)).reduce(add).then(log);
 ```
 
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