clang-format: Add a test that shows that some code I thought was dead is not dead.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@366926 91177308-0d34-0410-b5e6-96231b3b80d8

unittests/Format/FormatTest.cpp

@@ -6913,6 +6913,7 @@ TEST_F(FormatTest, UnderstandsUsesOfStarAndAmp) {
   verifyIndependentOfContext("if (int *a = &b)");
   verifyIndependentOfContext("if (int &a = *b)");
   verifyIndependentOfContext("if (a & b[i])");
+  verifyIndependentOfContext("if (a * (b * c))");
   verifyIndependentOfContext("if (a::b::c::d & b[i])");
   verifyIndependentOfContext("if (*b[i])");
   verifyIndependentOfContext("if (int *a = (&b))");