Bug 15604 Promote Fill arguments on method completion to a real preference
It is still in work in progress but it has become an established feature by now. Promote the preference to the code assist preference page.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/java/JavaCompletionProcessor.java
/**
	 * @see IContentAssistProcessor#getCompletionProposalAutoActivationCharacters()
	 */
	public char[] getCompletionProposalAutoActivationCharacters() {
		return fProposalAutoActivationSet;
	}
	
	private boolean looksLikeMethod(JavaCodeReader reader) throws IOException {
		int curr= reader.read();
		while (curr != JavaCodeReader.EOF && Character.isWhitespace((char) curr))
			curr= reader.read();
			
		if (curr == JavaCodeReader.EOF)
			return false;
		return Character.isJavaIdentifierPart((char) curr) || Character.isJavaIdentifierStart((char) curr);
	}
	
	private int guessContextInformationPosition(ITextViewer viewer, int offset) {
		int contextPosition= offset;
			
		IDocument document= viewer.getDocument();
		
		try {
			JavaCodeReader reader= new JavaCodeReader();
			reader.configureBackwardReader(document, offset, true, true);
	
			int nestingLevel= 0;
			int curr= reader.read();		
			while (curr != JavaCodeReader.EOF) {
				if (')' == (char) curr)