Bug 26547 Automatic closing of strings is not smart enough
Trying to add strings around an existing identifier is highly annoying when the Automatically close Strings option is set. For example, when I try to add Strings around: System.out.println(a) before a then I get two quotes. I suggest the rule to not close a string when there is a letter that belongs to an identifier to the left or right.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitEditor.java
* related editor properties.
	 * 
	 * @param event the property change event
	 */
	protected void handlePreferencePropertyChanged(org.eclipse.core.runtime.Preferences.PropertyChangeEvent event) {
		AdaptedSourceViewer asv= (AdaptedSourceViewer) getSourceViewer();
		if (asv != null) {
			String p= event.getProperty();					
			if (CODE_FORMATTER_TAB_SIZE.equals(p)) {
				asv.updateIndentationPrefixes();
				if (fTabConverter != null)
					fTabConverter.setNumberOfSpacesPerTab(getTabSize());
			}
		}
	}
	
	/*
	 * @see AbstractTextEditor#affectsTextPresentation(PropertyChangeEvent)
	 */
	protected boolean affectsTextPresentation(PropertyChangeEvent event) {
		String p= event.getProperty();
		boolean affects=MATCHING_BRACKETS_COLOR.equals(p) || CURRENT_LINE_COLOR.equals(p) || 
									ERROR_INDICATION_COLOR.equals(p) || WARNING_INDICATION_COLOR.equals(p) || TASK_INDICATION_COLOR.equals(p);
		return affects ? affects : super.affectsTextPresentation(event);
	}
	
	/*
	 * @see JavaEditor#createJavaSourceViewer(Composite, IVerticalRuler, int)
	 */
	protected ISourceViewer createJavaSourceViewer(Composite parent, IVerticalRuler ruler, int styles) {