function getNormalizedOptions(rawOptions, which) {
	return Object.assign({}, DEFAULTS, rawOptions[which] || rawOptions);
}
Get normalized options for either block or line comments from the given
user-provided options.
- If the user-provided options is just a string, returns a normalized
  set of options using default values for all other options.
- If the user-provided options is an object, then a normalized option
  set is returned. Options specified in overrides will take priority
  over options specified in the main options object, which will in
  turn take priority over the rule's defaults.
@param {Object|string} rawOptions The user-provided options.
@param {string} which Either "line" or "block".
@returns {Object} The normalized options.