Bug 33389 Read-Only files: Quick fix enabled and gets checkmark!
RC1 1. set a file to ready only. 2. Open the file an set the cursor inside 3. Open the 'Edit' menu. Note that 'Quick fix' is enabled, but 'Content assist' is not 4. Choose 'Quick fix' 5. Open the context menu: Quick fix got a checkmark!
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitEditor.java
int fOffset;
		int fLength;
		LinkedPositionManager fManager;
		LinkedPositionUI fEditor;
	};
	
	private class BracketInserter implements VerifyKeyListener, LinkedPositionUI.ExitListener {
		
		private boolean fCloseBrackets= true;
		private boolean fCloseStrings= true;
		private Stack fBracketLevelStack= new Stack();
		public void setCloseBracketsEnabled(boolean enabled) {
			fCloseBrackets= enabled;
		}