Improve InSpec tutorial

[chris-rock]

Description

The current tutorial misses some details:

• clear (linux) and cls (windows) command to clear the terminal
• proper scrolling of terminal
• style of tutorial text looks a little bit off
• sometimes the shell promp is off, i can remove content of the prompt with my back key
• continue to remove keys if i keep holding the back key
• we need to harmonize the recording terminal size = playing terminal size
• copy & paste content

[chris-rock]

The left side of the terminal is strage. Looks like the $ is prepended with a whitespace

If I switch between prev and next I may not be able to see the command prompt anymore.

[vjeffrey]

from davida (I asked her to test it out):

• "[in the instructions] i would expect inspec exec examples/profile to have a $ in front of it to indicate it’s a command to be typed at the prompt
  ie, $ inspec exec examples/profile
• automatically clear screen on next
• "hmm also possibly keep the navigation commands up in the top part of the screen" (next/prev)
• copy/paste
• she got stuck in the inspec shell/it was hanging
• typescript console errors
• use left arrow and right arrow to go back/forth through characters