Added a comment and some whitespace, in hopes of convincing Git to update my PR.

src/Compilers/CSharp/Portable/Compiler/Instrumentation.cs

@@ -168,6 +168,8 @@ public override BoundNode Visit(BoundNode node)
             BoundStatement statement = node as BoundStatement;
             if (statement != null)
             {
+                // The default behavior is to instrument a statement unless it is compiler generated.
+                // Filter out statements that are not to be instrumented, and force instrumentation of some compiler-generated statements.
                 switch (statement.Kind)
                 {
                     case BoundKind.SwitchSection:

src/Compilers/CSharp/Test/Emit/Emit/DynamicAnalysis/DynamicInstrumentationTests.cs

@@ -271,6 +271,7 @@ static int DoubleDeclaration(int x)
         int c = x;
         int a, b;
         int f;
+
         a = b = f = c;
         int d = a, e = b;
         return d + e + f;