Exception formatting code with misplaced Javadoc

Eclipse format source code breaks on an unusual example where javadoc appeared after an enum. This code is strange, but technically legal Java, I'd expect Eclipse tooling to handle it gracefully. This is a particular problem if the issue occurs in a large code base and you're trying to do a bulk format operation via source cleanup - this fails but it is not immediately clear why.

Steps
* Try and format this with Eclipse 2021-12 (4.22.0)
```
public enum Test {
FOO /** random javadoc */,
BAR
}
```

Expected
* Code to be formatted

Actual
* The formatting fails and the following exception is shown
```
Caused by: java.lang.IndexOutOfBoundsException: Index -1 out of bounds for length 9
at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64)
at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70)
at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:248)
at java.base/java.util.Objects.checkIndex(Objects.java:372)
at java.base/java.util.ArrayList.get(ArrayList.java:459)
at org.eclipse.jdt.internal.formatter.TokenManager.get(TokenManager.java:76)
at org.eclipse.jdt.internal.formatter.TokenManager.findIndex(TokenManager.java:169)
at org.eclipse.jdt.internal.formatter.TokenManager.firstIndexBefore(TokenManager.java:213)
at org.eclipse.jdt.internal.formatter.TokenManager.firstTokenBefore(TokenManager.java:217)
at org.eclipse.jdt.internal.formatter.SpacePreparator.handleTokenBefore(SpacePreparator.java:1162)
at org.eclipse.jdt.internal.formatter.SpacePreparator.handleCommas(SpacePreparator.java:1147)
at org.eclipse.jdt.internal.formatter.SpacePreparator.visit(SpacePreparator.java:204)
at org.eclipse.jdt.core.dom.EnumDeclaration.accept0(EnumDeclaration.java:253)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:3129)
at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:3200)
at org.eclipse.jdt.core.dom.CompilationUnit.accept0(CompilationUnit.java:258)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:3129)
at org.eclipse.jdt.internal.formatter.DefaultCodeFormatter.prepareSpaces(DefaultCodeFormatter.java:409)
at org.eclipse.jdt.internal.formatter.DefaultCodeFormatter.prepareFormattedCode(DefaultCodeFormatter.java:226)
at org.eclipse.jdt.internal.formatter.DefaultCodeFormatter.format(DefaultCodeFormatter.java:183)
at org.eclipse.jdt.internal.formatter.DefaultCodeFormatter.format(DefaultCodeFormatter.java:165)
at org.eclipse.jdt.internal.corext.util.CodeFormatterUtil.reformat(CodeFormatterUtil.java:361)
at org.eclipse.jdt.internal.ui.text.java.JavaFormattingStrategy.format(JavaFormattingStrategy.java:75)
at org.eclipse.jface.text.formatter.MultiPassContentFormatter.formatMaster(MultiPassContentFormatter.java:197)
at org.eclipse.jface.text.formatter.MultiPassContentFormatter.format(MultiPassContentFormatter.java:143)
at org.eclipse.jface.text.source.SourceViewer.doOperation(SourceViewer.java:1025)
at org.eclipse.jface.text.source.projection.ProjectionViewer.doOperation(ProjectionViewer.java:1466)
at org.eclipse.jdt.internal.ui.javaeditor.JavaSourceViewer.doOperation(JavaSourceViewer.java:179)
at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor$AdaptedSourceViewer.doOperation(CompilationUnitEditor.java:205)
at org.eclipse.ui.texteditor.TextOperationAction.lambda$0(TextOperationAction.java:130)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:74)
at org.eclipse.ui.texteditor.TextOperationAction.run(TextOperationAction.java:130)
at org.eclipse.jface.action.Action.runWithEvent(Action.java:474)
at org.eclipse.jface.commands.ActionHandler.execute(ActionHandler.java:121)
... 55 more
```