Bugfix# 1082026 This is a formatting case with Initializer Syntax that went...

Bugfix# 1082026 This is a formatting case with Initializer Syntax that went unhandled. Testcase added previously ascertained the regression. Now modifying the testcase to handle the regression.

Also a CR comment (changeset 1396819)

src/Workspaces/CSharp/Portable/Formatting/FormattingHelpers.cs

@@ -545,7 +545,7 @@ public static bool IsPlusOrMinusExpression(this SyntaxToken token)
 
         public static bool IsInterpolation(this SyntaxToken currentToken)
         {
-            return currentToken.Parent != null && currentToken.Parent.IsKind(SyntaxKind.Interpolation);
+            return currentToken.Parent.IsKind(SyntaxKind.Interpolation);
         }
     }
 }