Render the ASCII progress bar: dots grow with percent, e.g.
"[0%........56%]", completing as "[0%................100%]".
Indeterminate (no percent) renders "[...]".
Parameters
Optionalpercent: number
Percent complete 0-100, or undefined when indeterminate.
Render the ASCII progress bar: dots grow with percent, e.g. "[0%........56%]", completing as "[0%................100%]". Indeterminate (no percent) renders "[...]".