Is it shapeable?
You create a wall of churning elements, flensing debris, or roiling energy. The wall appears within 30 feet and can be either up to 10 feet high and up to 120 feet long or up to 20 feet high and up to 60 feet long. All creatures and objects in one of the wall’s squares when you create it take 1/4 the normal damage from your blast with no saving throw (or half the normal damage for an energy blast). Anytime a creature crosses the wall, it takes half the normal damage from your blast (or full damage for an energy blast). The wall is not completely solid, but it does provide cover against attacks from the other side of the wall. The wall lasts for a number of rounds equal to your Constitution modifier or until you use a wall infusion again.
There is no implication at all of it being shapeable. In the absence of that sort of text, I would think that it must be one solid line.