clang-format: Improve ObjC variadic and binary expression parameters.

Before:
  [self aaaaaaaaaaaaaaa:aaaaaaaaaaaaaaa | aaaaaaaaaaaaaaa | aaaaaaaaaaaaaaa |
                           aaaaaaaaaaaaaaa | aaaaaaaaaaaaaaa | aaaaaaaaaaaaaaa |
                           aaaaaaaaaaaaaaa | aaaaaaaaaaaaaaa];
  [self aaaaaaaaaaaaaaa:aaaaaaaaaaaaaaa,
      aaaaaaaaaaaaaaa, aaaaaaaaaaaaaaa, aaaaaaaaaaaaaaa, aaaaaaaaaaaaaaa,
      aaaaaaaaaaaaaaa, aaaaaaaaaaaaaaa, aaaaaaaaaaaaaaa];

After:
  [self aaaaaaaaaaaaaaa:aaaaaaaaaaaaaaa | aaaaaaaaaaaaaaa | aaaaaaaaaaaaaaa |
                        aaaaaaaaaaaaaaa | aaaaaaaaaaaaaaa | aaaaaaaaaaaaaaa |
                        aaaaaaaaaaaaaaa | aaaaaaaaaaaaaaa];
  [self aaaaaaaaaaaaaaa:aaaaaaaaaaaaaaa, aaaaaaaaaaaaaaa, aaaaaaaaaaaaaaa,
                        aaaaaaaaaaaaaaa, aaaaaaaaaaaaaaa, aaaaaaaaaaaaaaa,
                        aaaaaaaaaaaaaaa, aaaaaaaaaaaaaaa];

This addresses llvm.org/PR15349 and llvm.org/PR16185.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@194214 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Format/ContinuationIndenter.cpp b/lib/Format/ContinuationIndenter.cpp
index d2da252..a80e87d 100644
--- a/lib/Format/ContinuationIndenter.cpp
+++ b/lib/Format/ContinuationIndenter.cpp
@@ -499,7 +499,8 @@
   // is special cased.
   bool SkipFirstExtraIndent =
       (Previous && (Previous->opensScope() || Previous->is(tok::kw_return) ||
-                    Previous->getPrecedence() == prec::Assignment));
+                    Previous->getPrecedence() == prec::Assignment ||
+                    Previous->Type == TT_ObjCMethodExpr));
   for (SmallVectorImpl<prec::Level>::const_reverse_iterator
            I = Current.FakeLParens.rbegin(),
            E = Current.FakeLParens.rend();