code style: move from 2-space indent to 4-space indent
code style: move from 2-space indent to 4-space indent

harmishhk/catkin,asmodehn/catkin,harmishhk/catkin,meyerj/catkin,wkentaro/catkin,jack-oquin/catkin,meyerj/catkin,shyamalschandra/catkin,scpeters/catkin,scpeters/catkin,shyamalschandra/catkin,ros/catkin,meyerj/catkin,beni55/catkin,wkentaro/catkin,harmishhk/catkin,asmodehn/catkin,jack-oquin/catkin,ros/catkin,wkentaro/catkin,thaddeustaylor/catkin,shyamalschandra/catkin,ros/catkin,thaddeustaylor/catkin,thaddeustaylor/catkin,beni55/catkin,beni55/catkin,scpeters/catkin,asmodehn/catkin,jack-oquin/catkin