Narrows down text range, adjusting selection to non-space characters
@param {String} text
@param {Number} start Starting range in <code>text</code> where
slection should be adjusted. Can also be any object that is accepted
by <code>Range</code> class
@return {Range}
function(text, start, end) {
			var range = require('range').create(start, end);
			
			var reSpace = /[\s\n\r\u00a0]/;
			// narrow down selection until first non-space character
			while (range.start < range.end) {
				if (!reSpace.test(text.charAt(range.start)))
					break;
					
				range.start++;
			}
			
			while (range.end > range.start) {
				range.end--;
				if (!reSpace.test(text.charAt(range.end))) {
					range.end++;
					break;
				}
			}
			
			return range;
		}