Fixes PR14801 - preprocessor directives shouldn't be indented

Uses indent 0 for macros for now and resets the indent state to the
level prior to the preprocessor directive.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171639 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/unittests/Format/FormatTest.cpp b/unittests/Format/FormatTest.cpp
index 89fe71c..2165056 100644
--- a/unittests/Format/FormatTest.cpp
+++ b/unittests/Format/FormatTest.cpp
@@ -466,9 +466,12 @@
                "  }", getLLVMStyleWithColumns(11));
 }
 
+TEST_F(FormatTest, IndentPreprocessorDirectivesAtZero) {
+  EXPECT_EQ("{\n  {\n#define A\n  }\n}", format("{{\n#define A\n}}"));
+}
+
 // FIXME: write test for unbalanced braces in macros...
-// FIXME: test { { #include "a.h" } }
-// FIXME: test # in the middle of a statement without \n before it
+// FIXME: test # inside a normal statement (like {#define A b})
 
 TEST_F(FormatTest, MixingPreprocessorDirectivesAndNormalCode) {
   EXPECT_EQ(