Update readme.md

readme.md

@@ -5,7 +5,7 @@ Using Monte Carlo simulation to approximate the probability distribution for the
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 ## Install
-`$ npm install holdem-simulator`
+    $ npm install holdem-simulator
 
 ## Usage
 The function accepts two arrays - the cards on hand and the cards on the table (if any). You can also specify the number of players (2 by default) and the sample size (10000 by default).