REPL parsing fails sometimes

[EagleoutIce]

When issue a command like:

R> :slicer -c "2@x" -r "x <- 3 * 4\n y <- x * 2"

The argument parser seems to get tripped up by the <-. We should make it work with ; and <-!

[bjthehun]

Actually, the problems seems to come from how flowR currently splits user input with splitAtEscapeSensitive.

Split 1, in replProcessAnswer within src/cli/repl/core.ts, produces the statement:

[
	":slicer -c 2@x -r x <- 3 * 4\n y <- x * 2"
]

Here, the quotation marks surrounding the statement have been removed. From the current test cases, this seems to be the intended result.
Split 2, in lines 71-87 of src/cli/repl/commands/commands.ts, then produces the following arguments from -c 2@x -r x <- 3 * 4\n y <- x * 2:

[
  "-c",
  "2@x",
  "-r",
  "x",
  "<-",
  "3",
  "*",
  "4\n",
  "y",
  "<-",
  "x",
  "*",
  "2",
]

Because of the missing quotation marks, splitAtEscapeSensitive sees x, <-, 3 etc. as arguments, too. When I manually added back the quotation marks to the result of Split 1, the slicer command succeeded.
So, for splitting statements, flowR should probably leave in quotation marks.