Incorrect console width detected when running in Docker container

[istathar]

For some reason, when running in Docker the console width is determined to be (some small number) rather than whatever the parent enclosing terminal's width is. This is annoying, distorting e.g. --help output.

Strangely the logic in getConsoleWidth traps for failure and returns 80, so it is getting an answer and that answer is wrong. wtf