Don't use a bare percent sign in help text.

It gets interpreted as a truncated format, and was breaking --help.

Author: caladri

generate.py

@@ -80,7 +80,7 @@
 vq_parser.add_argument("-zvid", "--zoom_video", action='store_true', help="Create zoom video?", dest='make_zoom_video')
 vq_parser.add_argument("-zs",   "--zoom_start", type=int, help="Zoom start iteration", default=0, dest='zoom_start')
 vq_parser.add_argument("-zse",  "--zoom_save_every", type=int, help="Save zoom image iterations", default=10, dest='zoom_frequency')
-vq_parser.add_argument("-zsc",  "--zoom_scale", type=float, help="Zoom scale %", default=0.99, dest='zoom_scale')
+vq_parser.add_argument("-zsc",  "--zoom_scale", type=float, help="Zoom scale %%", default=0.99, dest='zoom_scale')
 vq_parser.add_argument("-zsx",  "--zoom_shift_x", type=int, help="Zoom shift x (left/right) amount in pixels", default=0, dest='zoom_shift_x')
 vq_parser.add_argument("-zsy",  "--zoom_shift_y", type=int, help="Zoom shift y (up/down) amount in pixels", default=0, dest='zoom_shift_y')
 vq_parser.add_argument("-cpe",  "--change_prompt_every", type=int, help="Prompt change frequency", default=0, dest='prompt_frequency')