clang-format: Slightly row back on r256343 by increasing penalty for

breaking between array subscripts.

Before:
  if (aaaaaaaaaaaaaaaaaaaaaaaa && aaaaaaaaaaaaaaaaaaa[aaaaaaaaaaaaa]
                                                     [aaaaaaaaaaaaa])
After:
  if (aaaaaaaaaaaaaaaaaaaaaaaa &&
      aaaaaaaaaaaaaaaaaaa[aaaaaaaaaaaaa][aaaaaaaaaaaaa])

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@256640 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Format/TokenAnnotator.cpp

@@ -1715,8 +1715,10 @@ unsigned TokenAnnotator::splitPenalty(const AnnotatedLine &Line,
                               Right.Next->is(TT_DictLiteral)))
     return 1;
   if (Right.is(tok::l_square)) {
-    if (Style.Language == FormatStyle::LK_Proto || Left.is(tok::r_square))
+    if (Style.Language == FormatStyle::LK_Proto)
       return 1;
+    if (Left.is(tok::r_square))
+      return 25;
     // Slightly prefer formatting local lambda definitions like functions.
     if (Right.is(TT_LambdaLSquare) && Left.is(tok::equal))
       return 50;

unittests/Format/FormatTest.cpp

@@ -6047,6 +6047,8 @@ TEST_F(FormatTest, FormatsArrays) {
                "                         [bbbbbbbbbbbbbbbbbbbbbbbbb] = c;");
   verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaa[aaaaaaaaaaa(aaaaaaaaaaaa)]\n"
                "                         [bbbbbbbbbbb(bbbbbbbbbbbb)] = c;");
+  verifyFormat("if (aaaaaaaaaaaaaaaaaaaaaaaa &&\n"
+               "    aaaaaaaaaaaaaaaaaaa[aaaaaaaaaaaaa][aaaaaaaaaaaaa]) {\n}");
   verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
                "    [bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb] = ccccccccccc;");
   verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"