Fixes READ_THEN_WRITTEN warning
Fixes READ_THEN_WRITTEN warning

Fixes a typo in cf88fa2f.

Previously, would display:
    <, g, e, n, e, r, a, t, o, r,  , o, b, j, e, c, t, ...
instead of the list of files.

JosuaKrause/reprozip,ViDA-NYU/reprozip,ViDA-NYU/reprozip,JosuaKrause/reprozip,ViDA-NYU/reprozip,ViDA-NYU/reprozip,ViDA-NYU/reprozip,JosuaKrause/reprozip,JosuaKrause/reprozip