Added indentation to complex example for clarity

No functional changes, just readability improvements by adding indentation and breaking out onto separate lines
Attempted to keep with existing example indentation style.

Author: jonathanmbaker

docs/t-sql/queries/from-using-pivot-and-unpivot.md

@@ -89,14 +89,16 @@ The following code displays the same result, pivoted so that the `DaysToManufact
 ```sql
 -- Pivot table with one row and five columns  
 SELECT 'AverageCost' AS Cost_Sorted_By_Production_Days,   
-[0], [1], [2], [3], [4]  
+  [0], [1], [2], [3], [4]  
 FROM  
-(SELECT DaysToManufacture, StandardCost   
-    FROM Production.Product) AS SourceTable  
+(
+  SELECT DaysToManufacture, StandardCost   
+  FROM Production.Product
+) AS SourceTable  
 PIVOT  
 (  
-AVG(StandardCost)  
-FOR DaysToManufacture IN ([0], [1], [2], [3], [4])  
+  AVG(StandardCost)  
+  FOR DaysToManufacture IN ([0], [1], [2], [3], [4])  
 ) AS PivotTable;  
 
 ```