Fix array syntax in ROI example code

backslashes appeared in the Java example code, possibly as a result of cut-and-paste from a browser. Fixed by removing the backslashes

Author: scouser-27

_pages/develop/rois.md

@@ -49,9 +49,9 @@ ROIs can be combined via a number of operations, namely: `and`, `or`, `negate`,
 The below example creates a composite ROI: 
 
 ```java
-final Sphere s1 = new ClosedWritableSphere( new double\[\] { 0, 0, 0 }, 3.5 );
-final Sphere s2 = new ClosedWritableSphere( new double\[\] { 1, 2, 0 }, 1.5 );
-final Sphere s3 = new ClosedWritableSphere( new double\[\] { 2, 2, 0 }, 1.5 );
+final Sphere s1 = new ClosedWritableSphere( new double[] { 0, 0, 0 }, 3.5 );
+final Sphere s2 = new ClosedWritableSphere( new double[] { 1, 2, 0 }, 1.5 );
+final Sphere s3 = new ClosedWritableSphere( new double[] { 2, 2, 0 }, 1.5 );
 final RealMaskRealInterval composite = s1.and( s2.minus( s3 ) ).and( s3 ).or( s1.minus( s3.negate() ) );
 ```