clang-format: Fix corner case for brace alignment.

Before:
  Constructor::Constructor()
      : some_value{ //
            aaaaaaa //
  } {}

After:
  Constructor::Constructor()
      : some_value{ //
            aaaaaaa //
        } {}

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@194204 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/unittests/Format/FormatTest.cpp b/unittests/Format/FormatTest.cpp
index fc6ef2b..00c684c 100644
--- a/unittests/Format/FormatTest.cpp
+++ b/unittests/Format/FormatTest.cpp
@@ -4543,6 +4543,11 @@
                  "  T member = {arg1, arg2};\n"
                  "};",
                  NoSpaces);
+    verifyFormat("Constructor::Constructor()\n"
+                 "    : some_value{ //\n"
+                 "          aaaaaaa //\n"
+                 "      } {}",
+                 NoSpaces);
 }
 
 TEST_F(FormatTest, FormatsBracedListsInColumnLayout) {