[clang-format] Currectly handle PCIS_CurrentLine with no column limit

[owenpan]

Summary

Fixes https://github.com/llvm/llvm-project/issues/63519.

clang/lib/Format/ContinuationIndenter.cpp

if (Current.is(TT_CtorInitializerColon) &&
     CurrentState.Indent = State.Column + (Style.BreakConstructorInitializers ==
                                                   FormatStyle::BCIS_BeforeComma
                                               ? 0
                                               : 2);
     CurrentState.NestedBlockIndent = CurrentState.Indent;
     if (Style.PackConstructorInitializers > FormatStyle::PCIS_BinPack) {
       CurrentState.AvoidBinPacking = true;
       CurrentState.BreakBeforeParameter =
+          Style.ColumnLimit > 0 &&
           Style.PackConstructorInitializers != FormatStyle::PCIS_NextLine &&
           Style.PackConstructorInitializers != FormatStyle::PCIS_NextLineOnly;
     } else {
       CurrentState.BreakBeforeParameter = false;
     }
   }
   if (Current.is(TT_CtorInitializerColon) &&
       Style.BreakConstructorInitializers == FormatStyle::BCIS_AfterColon) {

clang/unittests/Format/FormatTest.cpp

TEST_F(FormatTest, AllowAllConstructorInitializersOnNextLine) {
   Style.AllowAllParametersOfDeclarationOnNextLine = false;
   Style.PackConstructorInitializers = FormatStyle::PCIS_CurrentLine;
   verifyFormat("SomeClassWithALongName::Constructor(\n"
                "    int aaaaaaaaaaaaaaaaaaaaaaaa,\n"
                "    int bbbbbbbbbbbbb) :\n"
                "    aaaaaaaaaaaaaaaaaaaa(a),\n"
                "    bbbbbbbbbbbbbbbbbbbbb(b) {}",
                Style);
+
+  Style = getLLVMStyleWithColumns(0);
+  Style.PackConstructorInitializers = FormatStyle::PCIS_CurrentLine;
+  verifyFormat("Foo(Bar bar, Baz baz) : bar(bar), baz(baz) {}", Style);
+  verifyNoChange("Foo(Bar bar, Baz baz)\n"
+                 "    : bar(bar), baz(baz) {}",
+                 Style);
 }
 
 TEST_F(FormatTest, AllowAllArgumentsOnNextLine) {
   FormatStyle Style = getLLVMStyleWithColumns(60);
   Style.BinPackArguments = false;
   for (int i = 0; i < 4; ++i) {
     // Test all combinations of parameters that should not have an effect.
     Style.AllowAllParametersOfDeclarationOnNextLine = i & 1;