clang-format: [ObjC] Further improve wrapping of methods calls without inputs.

Before:
  [aaaaaaaaaaaaaaaaaaaaaaa
      .aaaaaaaa[aaaaaaaaaaaaaaaaaaaaa] aaaaaaaaaaaaaaaaaaaaaa];

After:
  [aaaaaaaaaaaaaaaaaaaaaaa.aaaaaaaa[aaaaaaaaaaaaaaaaaaaaa]
      aaaaaaaaaaaaaaaaaaaaaa];

llvm-svn: 237244
diff --git a/clang/unittests/Format/FormatTest.cpp b/clang/unittests/Format/FormatTest.cpp
index fbe651e..105d1a1 100644
--- a/clang/unittests/Format/FormatTest.cpp
+++ b/clang/unittests/Format/FormatTest.cpp
@@ -7299,6 +7299,8 @@
                "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa];");
   verifyFormat("[aaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaa)\n"
                "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa];");
+  verifyFormat("[aaaaaaaaaaaaaaaaaaaaaaa.aaaaaaaa[aaaaaaaaaaaaaaaaaaaaa]\n"
+               "    aaaaaaaaaaaaaaaaaaaaaa];");
 
   verifyFormat(
       "scoped_nsobject<NSTextField> message(\n"