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/ui/PreferencesConstants.java
* Enable / Disable the usage of bold style for single line comments.
	 */
	public final static String EDITOR_SINGLE_LINE_COMMENT_BOLD= IJavaColorConstants.JAVA_SINGLE_LINE_COMMENT + JavaEditorPreferencePage.BOLD;
	/**
	 * Color used for java keywords. RGB color encoded using PreferenceConverter.
	 * @see org.eclipse.jface.resource.StringConverter
	 * @see org.eclipse.jface.preference.PreferenceConverter
	 */
	public final static String EDITOR_JAVA_KEYWORD_COLOR= IJavaColorConstants.JAVA_KEYWORD;
	/**
	 * Enable / Disable the usage of bold style for java keywords.
	 */
	public final static String EDITOR_JAVA_KEYWORD_BOLD= IJavaColorConstants.JAVA_KEYWORD + JavaEditorPreferencePage.BOLD;
	/**
	 * Color used for string constants. RGB color encoded using PreferenceConverter.
	 * @see org.eclipse.jface.resource.StringConverter
	 * @see org.eclipse.jface.preference.PreferenceConverter
	 */
	public final static String EDITOR_STRING_COLOR= IJavaColorConstants.JAVA_STRING;
	/**
	 * Enable / Disable the usage of bold style for string constants.
	 */
	public final static String EDITOR_STRING_BOLD= IJavaColorConstants.JAVA_STRING + JavaEditorPreferencePage.BOLD;
	/**
	 * Color used for java default text. RGB color encoded using PreferenceConverter.
	 * @see org.eclipse.jface.resource.StringConverter
	 * @see org.eclipse.jface.preference.PreferenceConverter
	 */
	public final static String EDITOR_JAVA_DEFAULT_COLOR= IJavaColorConstants.JAVA_DEFAULT;
	/**