While Black leaves the following unchanged under preview:

if True: print("this") # fmt: skip

and the following unchanged even without preview:

print("this"); print("that") # fmt: skip

it does not seem to leave the combination of these unchanged - see below.

Black 314f8c

Playground link

Options

--line-length=88
--safe
--preview

Input

if True: print("this"); print("that") # fmt: skip

Output

if True:
    print("this"); print("that") # fmt: skip

Expected

if True: print("this"); print("that") # fmt: skip