comment fixes

src/test/java/com/xeiam/xchart/example/Example3.java

@@ -22,7 +22,7 @@ import com.xeiam.xchart.Chart;
 import com.xeiam.xchart.SwingWrapper;
 
 /**
- * Create multiple curves on one chart
+ * Create multiple curves on one Chart
  * 
  * @author timmolter
  */

src/test/java/com/xeiam/xchart/example/Example4.java

@@ -23,7 +23,7 @@ import com.xeiam.xchart.QuickChart;
 import com.xeiam.xchart.SwingWrapper;
 
 /**
- * Create a chart matrix
+ * Create a Chart matrix
  * 
  * @author timmolter
  */

src/test/java/com/xeiam/xchart/example/Example6.java

@@ -19,7 +19,7 @@ import com.xeiam.xchart.Chart;
 import com.xeiam.xchart.SwingWrapper;
 
 /**
- * Create chart with single point
+ * Create Chart with single point
  * 
  * @author timmolter
  */

src/test/java/com/xeiam/xchart/example/Example7.java

@@ -22,7 +22,7 @@ import com.xeiam.xchart.Chart;
 import com.xeiam.xchart.SwingWrapper;
 
 /**
- * Creates a simple charts using Longs as inputs
+ * Creates a simple Chart using Longs as X-Axis data
  * 
  * @author timmolter
  */

src/test/java/com/xeiam/xchart/example/Example9.java

@@ -34,7 +34,7 @@ import com.xeiam.xchart.SeriesMarker;
 import com.xeiam.xchart.SwingWrapper;
 
 /**
- * Create a chart with a Date x-axis and extensive chart customization
+ * Create a Chart with a Date x-axis and extensive chart customization
  * 
  * @author timmolter
  */