clang-format: Cleanup array initializer and dict initializer formatting.

Significant changes:
- Also recognize these literals with missing "@" for robustness.
- Reorganize tests.

llvm-svn: 193325
diff --git a/clang/lib/Format/FormatToken.cpp b/clang/lib/Format/FormatToken.cpp
index 35764ce..4ca4edb 100644
--- a/clang/lib/Format/FormatToken.cpp
+++ b/clang/lib/Format/FormatToken.cpp
@@ -37,6 +37,7 @@
   const FormatToken *LBrace = State.NextToken->Previous->Previous;
   if (LBrace->isNot(tok::l_brace) ||
       LBrace->BlockKind == BK_Block ||
+      LBrace->Type == TT_DictLiteral ||
       LBrace->Next->Type == TT_DesignatedInitializerPeriod)
     return 0;