clang-format: Fix pointer/reference detection after decltype.

Before:
  [](const decltype(*a) & value) {}

After:
  [](const decltype(*a)& value) {}

llvm-svn: 210643
diff --git a/clang/unittests/Format/FormatTest.cpp b/clang/unittests/Format/FormatTest.cpp
index a923e1a..f474c42 100644
--- a/clang/unittests/Format/FormatTest.cpp
+++ b/clang/unittests/Format/FormatTest.cpp
@@ -4740,6 +4740,7 @@
   verifyFormat("auto a = [](int **&, int ***) {};");
   verifyFormat("auto PointerBinding = [](const char *S) {};");
   verifyFormat("typedef typeof(int(int, int)) *MyFunc;");
+  verifyFormat("[](const decltype(*a) &value) {}");
   verifyIndependentOfContext("typedef void (*f)(int *a);");
   verifyIndependentOfContext("int i{a * b};");
   verifyIndependentOfContext("aaa && aaa->f();");