Fixed whitespace in new test in TestDelegates.

tests/Basic/Basic.Tests.cs

@@ -177,8 +177,8 @@ public class BasicTests : GeneratorTestFixture
         var doubleSum = delegates.A(2) + delegates.B(2);
         Assert.AreEqual(8, doubleSum);
 
-		var stdcall = delegates.StdCall(i => i);
-		Assert.AreEqual(1, stdcall);
+        var stdcall = delegates.StdCall(i => i);
+        Assert.AreEqual(1, stdcall);
 
         var cdecl = delegates.CDecl(i => i);
         Assert.AreEqual(1, cdecl);