update specification

Author: Cheng-Lin-Li

DecisionTree/README.md

@@ -23,7 +23,7 @@ Assume that you have kept a record of your previous night-outs with the followin
 
 ## Technical Specification and Report
 
-Click ** [Here](https://github.com/Cheng-Lin-Li/MachineLearning/blob/master/DecisionTree/TechnicalSpecification-%5BDecisionTree%5D-%5B1.1%5D-%5B20160929%5D.pdf) ** to read the detail specification and report.
+Click [** Here **](https://github.com/Cheng-Lin-Li/MachineLearning/blob/master/DecisionTree/TechnicalSpecification-%5BDecisionTree%5D-%5B1.1%5D-%5B20160929%5D.pdf) to read the detail specification and report.
 
 #### Usage: python DecisionTree.py dt-data.txt