code formatting

worksheets/worksheet5/worksheet5.md

 # Worksheet 5:
 ## Stacks & RPN Calculator
 
-  
-
 ```c++
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 class Worksheet{
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 public:
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 Worksheet(int n){
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-sessionNo = n;
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+	sessionNo = n;
 }
 
 void whatSession(){
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-printf("Worksheet %d", sessionNo);
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+	printf("Worksheet %d", sessionNo);
 }
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 private:
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-int sessionNo;
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-};
-
-  
+	int sessionNo;
+}; 
 
 int main(){
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-Worksheet worksheet(6);
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-worksheet.whatSession();
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-return 0;
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+	Worksheet worksheet(6);
+	worksheet.whatSession();
+	
+	return 0;
 }
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-  
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 ```