clang-format: Improve line breaks in @property.

Before:
  @property(nonatomic, assign,
            readonly) NSString *looooooooooooooooooooooooooooongName;

After:
  @property(nonatomic, assign, readonly)
      NSString *looooooooooooooooooooooooooooongName;

llvm-svn: 187577
diff --git a/clang/unittests/Format/FormatTest.cpp b/clang/unittests/Format/FormatTest.cpp
index d5b9f27..6a5f022 100644
--- a/clang/unittests/Format/FormatTest.cpp
+++ b/clang/unittests/Format/FormatTest.cpp
@@ -4663,6 +4663,11 @@
                "@optional\n"
                "@property(assign) int madProp;\n"
                "@end\n");
+
+  verifyFormat("@property(nonatomic, assign, readonly)\n"
+               "    int *looooooooooooooooooooooooooooongNumber;\n"
+               "@property(nonatomic, assign, readonly)\n"
+               "    NSString *looooooooooooooooooooooooooooongName;");
 }
 
 TEST_F(FormatTest, FormatObjCMethodDeclarations) {