"Show inserted labels" diagnostics don't work when a label is inserted via macro

[hwayne]

Description:

Steps to reproduce:

1. In the settings file, set "tlaplus.pluscal.options": "-reportLabels",
2. Translate the following algorithm:

(*--algorithm alg {
variable x = 1;
macro inc() {
    x := x + 1;
}
process (hello = 1) {
    x := x + 1;
    x := x + 1;
    inc();
    x := x + 1;
    x := x + 1;
}

} *)

Expectations:

Diagnostics should underline all five lines, showing that five labels were inserted. But diagnostics stop after the second label.

Cause:

The problem is this line in the PlusCal parser:

vscode-tlaplus/src/parsers/pluscal.ts

Lines 127 to 131 in a3169ad

	const matcher = /^\s\s([A-Za-z0-9_]+) at line \d+, column \d+$/g.exec(line);
	if (!matcher) { // done parsing
	this.nowParsingAddedLabels = false;
	return false;
	}

This matches regular labels, but labels inserted from macros have a different format:

The following labels were added:
  Lbl_1 at line 11, column 5
  Lbl_2 at line 12, column 5
  Lbl_3 at line 8, column 5 of macro called at line 13, column 5
  Lbl_4 at line 14, column 5
  Lbl_5 at line 15, column 5

So the label parser terminates early and doesn't label the macro or any lines past the macro.

Notes:

Go ahead and assign this to me, I can fix it next week