Gillingham manager Mark Bonner is expecting their toughest away test yet in the league when they take on Doncaster Rovers. The Gills have won at Morecambe and returned with a point from Fleetwood, without conceding in either game, but Doncaster look to have taken their end-of-season form from last term into the new campaign. More: New deal for Gillingham midfielder Rovers went on an incredible 10-game winning streak – ending with a draw at Gillingham \- which was enough to clinch a place in the play-offs. They were eventually stopped by Crewe after losing on penalties in the second leg of thei…