hotfix elc reader

[sappelhoff]

• follow up to Add update to .elc montage reader #12830
• see also [pre-commit.ci] pre-commit autoupdate #12837

@larsoner a proper test to include would be to add to each pytest.parametrize item the expected channel names that the montage should contain. Do you think that's overkill, or should we do it?

[agramfort]

you don't have a file to test this?

[sappelhoff]

you don't have a file to test this?

I do, but in the tests we do it as follows:

mne-python/mne/channels/tests/test_montage.py

Lines 305 to 327 in f3a3ca4

	pytest.param(
	partial(read_custom_montage, head_size=None),
	(
	"NumberPositions= 96\n"
	"UnitPosition mm\n"
	"Positions\n"
	"E01 : 5.288 -3.658 119.693\n"
	"E02 : 59.518 -4.031 101.404\n"
	"E03 : 29.949 -50.988 98.145\n"
	"Labels\n"
	"E01 E02 E03\n"
	),
	make_dig_montage(
	ch_pos={
	"E01": [0.005288, -0.003658, 0.119693],
	"E02": [0.059518, -0.004031, 0.101404],
	"E03": [0.029949, -0.050988, 0.098145],
	},
	),
	"elc",
	None,
	id="new ASA electrode (elc)",
	),

☝️ I basically added the gist of the contents of the test file I have here

[agramfort]

I would personally add the test

[larsoner]

Added a test using parts of the failing file and touched the problematic example, marking for merge-when-green, thanks in advance @sappelhoff !