Fix bug when formatting "A<A<A>>".

Before:
A<A<A>> ReadKansas(int aaaaaaaaaaaaaaaaaaaaaaaaaaa,
                     int aaaaaaaaaaaaaaaaaaaaaaa);
Before:
A<A<A>> ReadKansas(int aaaaaaaaaaaaaaaaaaaaaaaaaaa,
                   int aaaaaaaaaaaaaaaaaaaaaaa);

llvm-svn: 176244

clang/lib/Format/Format.cpp

@@ -999,6 +999,7 @@ public:
 
     if (FormatTok.Tok.is(tok::greatergreater)) {
       FormatTok.Tok.setKind(tok::greater);
+      FormatTok.TokenLength = 1;
       GreaterStashed = true;
     }
 

clang/unittests/Format/FormatTest.cpp

@@ -2002,6 +2002,8 @@ TEST_F(FormatTest, BreaksLongDeclarations) {
   verifyGoogleFormat("template <typename T>\n"
                      "aaaaaaaa::aaaaa::aaaaaa<T, aaaaaaaaaaaaaaaaaaaaaaaaa>\n"
                      "aaaaaaaaaaaaaaaaaaaaaaaa<T>::aaaaaaa() {}");
+  verifyGoogleFormat("A<A<A>> aaaaaaaaaa(int aaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
+                     "                   int aaaaaaaaaaaaaaaaaaaaaaa);");
 }
 
 TEST_F(FormatTest, LineStartsWithSpecialCharacter) {