Find which editor is being used by Terminal when `info` is run I have run the command info bash in my Terminal and it opened bash.info file in the terminal editor. 

What type of editor am I seeing here. Is it emacs, vim, something else?
What you started not an editor but the program info. You can press ? to learn about the key shortcuts available. As info is the GNU documentation tool of choice it's probably no surprise that these key shortcuts closely resemble the ones used by emacs proper.