clang-format: Fix excessive formatting caused by r195954.

Due to a bug in the patch, clang-format would more or less simply format
all multi-line comments.

llvm-svn: 196080
diff --git a/clang/unittests/Format/FormatTest.cpp b/clang/unittests/Format/FormatTest.cpp
index 9fac17b..17972c6 100644
--- a/clang/unittests/Format/FormatTest.cpp
+++ b/clang/unittests/Format/FormatTest.cpp
@@ -859,6 +859,13 @@
                    "\n"
                    "  // This is unrelated",
                    0, 0, getLLVMStyle()));
+  EXPECT_EQ("int a;\n"
+            "// This is\n"
+            "// not formatted.   ",
+            format("int a;\n"
+                   "// This is\n"
+                   "// not formatted.   ",
+                   0, 0, getLLVMStyle()));
 }
 
 TEST_F(FormatTest, RemovesTrailingWhitespaceOfComments) {