clang-format: Fix incorrect lambda-detection.

Before:
  [ a, a ]() -> a<1>{};

After:
  [a, a]() -> a<1> {};

llvm-svn: 244890

clang/lib/Format/UnwrappedLineParser.cpp

@@ -1000,6 +1000,7 @@ bool UnwrappedLineParser::tryToParseLambda() {
     case tok::less:
     case tok::greater:
     case tok::identifier:
+    case tok::numeric_constant:
     case tok::coloncolon:
     case tok::kw_mutable:
       nextToken();

clang/unittests/Format/FormatTest.cpp

@@ -10003,6 +10003,7 @@ TEST_F(FormatTest, FormatsLambdas) {
   verifyGoogleFormat("auto a = [&b, c](D* d) -> pair<D*, D*> {};");
   verifyGoogleFormat("auto a = [&b, c](D* d) -> D& {};");
   verifyGoogleFormat("auto a = [&b, c](D* d) -> const D* {};");
+  verifyFormat("[a, a]() -> a<1> {};");
   verifyFormat("auto aaaaaaaa = [](int i, // break for some reason\n"
                "                   int j) -> int {\n"
                "  return ffffffffffffffffffffffffffffffffffffffffffff(i * j);\n"