tidy_bathymetry fills channels when fill_channels=False

[aekiss]

Looks like some repeated code here. Should lines 1376-1382 be removed? Otherwise tidy_bathymetry fills horizontal and vertical (but not diagonal) channels when fill_channels is false.

regional-mom6/regional_mom6/regional_mom6.py

Lines 1376 to 1395 in 0bfe4ba

	## Now fill in all one-cell-wide channels
	newmask = xr.where(
	ocean_mask * (land_mask.shift(nx=1) + land_mask.shift(nx=-1)) == 2, 1, 0
	)
	newmask += xr.where(
	ocean_mask * (land_mask.shift(ny=1) + land_mask.shift(ny=-1)) == 2, 1, 0
	)
	if fill_channels == True:
	## fill in all one-cell-wide horizontal channels
	newmask = xr.where(
	ocean_mask * (land_mask.shift(nx=1) + land_mask.shift(nx=-1)) == 2,
	1,
	0,
	)
	newmask += xr.where(
	ocean_mask * (land_mask.shift(ny=1) + land_mask.shift(ny=-1)) == 2,
	1,
	0,
	)