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

lib/Format/ContinuationIndenter.cpp

@@ -337,7 +337,9 @@ unsigned ContinuationIndenter::addTokenOnNewLine(LineState &State,
   if (Current.is(tok::l_brace) && Current.BlockKind == BK_Block) {
     State.Column = State.FirstIndent;
   } else if (Current.isOneOf(tok::r_brace, tok::r_square)) {
-    if (Current.closesBlockTypeList(Style))
+    if (Current.closesBlockTypeList(Style) ||
+        (Current.MatchingParen &&
+         Current.MatchingParen->BlockKind == BK_BracedInit))
       State.Column = State.Stack[State.Stack.size() - 2].LastSpace;
     else
       State.Column = State.FirstIndent;

unittests/Format/FormatTest.cpp

@@ -4543,6 +4543,11 @@ TEST_F(FormatTest, LayoutCxx11ConstructorBraceInitializers) {
                  "  T member = {arg1, arg2};\n"
                  "};",
                  NoSpaces);
+    verifyFormat("Constructor::Constructor()\n"
+                 "    : some_value{ //\n"
+                 "          aaaaaaa //\n"
+                 "      } {}",
+                 NoSpaces);
 }
 
 TEST_F(FormatTest, FormatsBracedListsInColumnLayout) {