Bug 52611 [QuickDiff] Let QuickDiff hovers adapt to horizontal scrollbar
Test Case: - on a long line: make a change such that you have to scroll horizontally to see the change - use QuickDiff -> Hover shows line from its start and does not match the horizontally scrolled text in the editor
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/JavaChangeHover.java
String fPartition;
	
	CustomSourceInformationControl fInformationControl;
	
	private String fPartitioning;
	
	/**
	 * Creates a new change hover for the given document partitioning.
	 * 
	 * @param partitioning the document partitioning
	 */
	public JavaChangeHover(String partitioning) {
		fPartitioning= partitioning;
	}
	
	/*
	 * @see org.eclipse.ui.internal.editors.text.LineChangeHover#formatSource(java.lang.String)
	 */
	protected String formatSource(String content) {