[clang-format] Fix a bug in AlignConsecutiveAssignments

[owenpan]

Summary

Fixes https://github.com/llvm/llvm-project/issues/55113.

[curdeius]

Looks ok, but please let someone else have a look too.

clang/lib/Format/WhitespaceManager.cpp

if (InsideNestedScope && Changes[i].NewlinesBefore > 0) {
         // Continued function call
         if (ScopeStart > Start + 1 &&
             Changes[ScopeStart - 2].Tok->is(tok::identifier) &&
             Changes[ScopeStart - 1].Tok->is(tok::l_paren) &&
             Changes[ScopeStart].Tok->isNot(TT_LambdaLSquare)) {
           if (Changes[i].Tok->MatchingParen &&
               Changes[i].Tok->MatchingParen->is(TT_LambdaLBrace))
             return false;
+          if (Changes[ScopeStart].NewlinesBefore > 0)
+            return false;
           return Style.BinPackArguments;
         }
 
         // Ternary operator
         if (Changes[i].Tok->is(TT_ConditionalExpr))
           return true;
 
         // Period Initializer .XXX = 1.

clang/unittests/Format/FormatTest.cpp

verifyFormat("void foo() {\n"
                "  const auto newEntry       = Entries.emplaceHint(std::piecewise_construct, std::forward_as_tuple(uniqueId),\n"
                "                                                  std::forward_as_tuple(id, uniqueId, name, threadCreation));\n"
                "  const X    newEntry2      = Entries.emplaceHint(std::piecewise_construct, std::forward_as_tuple(uniqueId),\n"
                "                                                  std::forward_as_tuple(id, uniqueId, name, threadCreation));\n"
                "}",
                Style);
   // clang-format on
 
-  Style = getLLVMStyleWithColumns(120);
+  Style = getLLVMStyleWithColumns(20);
   Style.AlignConsecutiveAssignments.Enabled = true;
-  Style.ContinuationIndentWidth = 4;
   Style.IndentWidth = 4;
 
+  verifyFormat("void foo() {\n"
+               "    int i1 = 1;\n"
+               "    int j  = 0;\n"
+               "    int k  = bar(\n"
+               "        argument1,\n"
+               "        argument2);\n"
+               "}",
+               Style);
+
+  Style.ColumnLimit = 120;
+
   // clang-format off
   verifyFormat("void SomeFunc() {\n"
                "    newWatcher.maxAgeUsec = ToLegacyTimestamp(GetMaxAge(FromLegacyTimestamp<milliseconds>(monitorFrequencyUsec),\n"
                "                                                        seconds(std::uint64_t(maxSampleAge)), maxKeepSamples));\n"
                "    newWatcher.maxAge     = ToLegacyTimestamp(GetMaxAge(FromLegacyTimestamp<milliseconds>(monitorFrequencyUsec),\n"
                "                                                        seconds(std::uint64_t(maxSampleAge)), maxKeepSamples));\n"
                "    newWatcher.max        = ToLegacyTimestamp(GetMaxAge(FromLegacyTimestamp<milliseconds>(monitorFrequencyUsec),\n"
                "                                                        seconds(std::uint64_t(maxSampleAge)), maxKeepSamples));\n"