Bug 43032 Autoindent/Smart Tab in case statement
... case label: { <press Enter here> I <new cursor position> Indentation level should be one less.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/JavaIndenter.java
case Symbols.TokenLBRACE: 
						if (fScanner.isBracelessBlockStart(prevPos, JavaHeuristicScanner.UNBOUND))
							unindent= true;
						break;
					case Symbols.TokenRBRACE: 
						matchBrace= true;
				}
			} else {
				danglingElse= true;
			}
			
			
			int unit= findReferencePosition(position, danglingElse, matchBrace);
			
			
			if (fAlign != JavaHeuristicScanner.NOT_FOUND) {
				
				IRegion line= fDocument.getLineInformationOfOffset(fAlign);
				int offset= line.getOffset();
				return createIndent(offset, fAlign);
			}
			
			
			if (unit == JavaHeuristicScanner.NOT_FOUND)
				return null; 
			
			
			IRegion line= fDocument.getLineInformationOfOffset(unit);
			int offset= line.getOffset();
			int nonWS= fScanner.findNonWhitespaceForwardInAnyPartition(offset, offset + line.getLength());