All of the descriptions I've seen online describing Chandrayaan-2's path to the Moon either explicitly or implicitly describe it involving a "gravity assist":
The spacecraft will make use of the Earth's gravity to amp-up its own velocity using a technique popularly referred to as 'gravity assist', to conserve fuel.
But every illustration I've seen that attempts to show the relent information about the orientation of the spacecraft's path, shows the craft heading the wrong direction to achieve a gravity assist:
My (admittedly rudimentary) understanding of a gravity assist is that it relies on a much more massive body tugging a spacecraft along the larger body's orbital path on closest approach; but these illustrations (like the one above) show Chandrayaan-2 heading in the opposite direction at periapsis.
Does Chandrayaan 2 use gravity assist? If so what aspect of gravity assist have I got wrong. If not, what is the correct characterization of Chandrayaan-2's fuel saving maneuver?