[clang-format] Fix ColumnLimit violation while aligning

It did compute the length only on the first line, and thus the following
lines could be (and in the test example were) moved over the column
limit, when the = was aligned.

Author: HazardyKnusperkeks

clang/lib/Format/WhitespaceManager.cpp

@@ -591,7 +591,8 @@ static unsigned AlignTokens(const FormatStyle &Style, F &&Matches,
       CurrentChangeWidthRight = CurrentChange.TokenLength;
     const FormatToken *MatchingParenToEncounter = nullptr;
     for (unsigned J = I + 1;
-         J != E && (Changes[J].NewlinesBefore == 0 || MatchingParenToEncounter);
+         J != E && (Changes[J].NewlinesBefore == 0 ||
+                    MatchingParenToEncounter || Changes[J].IsAligned);
          ++J) {
       const auto &Change = Changes[J];
       const auto *Tok = Change.Tok;

clang/unittests/Format/FormatTest.cpp

@@ -20820,6 +20820,13 @@ TEST_F(FormatTest, AlignWithLineBreaks) {
                "    argument1,\n"
                "    argument2);",
                Style);
+
+  Style.ColumnLimit = 45;
+  verifyFormat("auto xxxxxxxx = foo;\n"
+               "auto x = whatever ? some / long -\n"
+               "                        computition / stuff\n"
+               "                  : random;",
+               Style);
 }
 
 TEST_F(FormatTest, AlignWithInitializerPeriods) {