code: function incrementNumber(editor, step) {
  		var utils = require('utils');
  		var actionUtils = require('actionUtils');
  		
  		var hasSign = false;
  		var hasDecimal = false;
  			
  		var r = actionUtils.findExpressionBounds(editor, function(ch, pos, content) {
  			if (utils.isNumeric(ch))
  				return true;
  			if (ch == '.') {
  				// make sure that next character is numeric too
  				if (!utils.isNumeric(content.charAt(pos + 1)))
  					return false;
  				
  				return hasDecimal ? false : hasDecimal = true;
  			}
  			if (ch == '-')
  				return hasSign ? false : hasSign = true;
  				
  			return false;
  		});
  			
  		if (r && r.length()) {
  			var strNum = r.substring(String(editor.getContent()));
  			var num = parseFloat(strNum);
  			if (!_.isNaN(num)) {
  				num = utils.prettifyNumber(num + step);
  				
  				// do we have zero-padded number?
  				if (/^(\-?)0+[1-9]/.test(strNum)) {
  					var minus = '';
  					if (RegExp.$1) {
  						minus = '-';
  						num = num.substring(1);
  					}
  						
  					var parts = num.split('.');
  					parts[0] = utils.zeroPadString(parts[0], intLength(strNum));
  					num = minus + parts.join('.');
  				}
  				
  				editor.replaceContent(num, r.start, r.end);
  				editor.createSelection(r.start, r.start + num.length);
  				return true;
  			}
  		}
  		
  		return false;
  	}
docs: Extract number from current caret position of the <code>editor</code> and
  increment it by <code>step</code>
  @param {IEmmetEditor} editor
  @param {Number} step Increment step (may be negative)