Consistency in referring to the terminal instances in the tutorial

[aral]

In https://try-dat.com/06-dat-git-partial.html, there’s initially reference to “local terminal” and then to “source terminal”. Unless I’m mistaken, these are referring to the same terminal instance. We should stick to one or the other.

Similarly, in https://try-dat.com/05-website.html, both “virtual terminal” and “source terminal” are used.

In https://try-dat.com/02-link.html, the first qualification of terminals is made as there’s a source and destination terminal. Before that point, we use the generic term “terminal”.

I’d suggest that when a distinction between terminals doesn’t need to be made, we should simply refer to “the terminal” and when it does, to consistently name and refer to them so as not to confuse readers.

Will send a basic PR in a few moments.