tessel erase should check if app-mode erase succeeded before suggesting dfu-erase

[tjwebb]

TESSEL! Connected to TM-00-04-f0009a30-00614f54-62966249.
INFO Attempting to erase Tessel filesystem.
INFO If erasing failed, press the Reset button while holding down the Config button, then try again

re: If erasing failed: erasing always fails. and worse, there's no error message

[kevinmehall]

If you're having trouble with it, please describe the steps you took and expected behavior in a thread on the forum instead of opening an unclear bug.

It doesn't actually test whether the erase command completed, so it always displays that message. That's an actionable issue and I've updated the bug to reflect that.

[tjwebb]

If you're having trouble with it, please describe the steps you took and expected behavior in a thread on the forum instead of opening an unclear bug.

I'm not sure how this is unclear. tessel erase does not erase my existing usercode on the device. And it displays no informational error, so there's nothing else I can tell you.