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/CustomSourceInformationControl.java
else
			fPartition= partition;
	}
	
	/*
	 * @see org.eclipse.jface.text.IInformationControl#setInformation(java.lang.String)
	 */
	public void setInformation(String content) {
		super.setInformation(content);
		IDocument doc= getViewer().getDocument();
		if (doc == null)
			return;
			
		String start= null;
		if (IJavaPartitions.JAVA_DOC.equals(fPartition)) {
			start= "/**" + doc.getLegalLineDelimiters()[0]; 
		} else if (IJavaPartitions.JAVA_MULTI_LINE_COMMENT.equals(fPartition)) {
			start= "/*" + doc.getLegalLineDelimiters()[0]; 
		}
		if (start != null) {
			try {
				doc.replace(0, 0, start);
				int startLen= start.length();
				getViewer().setDocument(doc, startLen, doc.getLength() - startLen);
			} catch (BadLocationException e) {
			}
		}
	}
}