Undoing #6680 "API should store pending code, run code, and then put pending code back"

[bennotkin]

In VS Code, I will often temporarily assign a variable by typing an incomplete assignment into the terminal (would be console in Positron), and then running the relevant lines. For example, I'd type in x <- , and then select the relevant R code in my script, and hit ⌘+Enter). This is especially convenient to save the top part of piped sequence.

In issue #6680, this capability was removed. Positron now saves and clears pending code before running code sent to the console. I understand why this might be more friendly to some users, especially those coming from RStudio, but I believe it represents a loss in functionality.

I'd be very interested in seeing either

1. An option to change this behavior, or
2. A middleground, where code that has been entered in the console stays, but unsubmitted code does not (so, in this case, if I simply typed in x <- , the console would proceed in the post-6680 way, saving and clearing the pending code, while if I hit enter have typing x <-, the console would proceed in the pre-6680 way, using the pending code.

[jmcphers]

Thanks for the feedback! I've moved this to an official feature request in #12683.