Effectively, it's the right thing.
But not only two, also 3 or 4. It depends on what you put in format text
exemple with 1 500 000
if you put [3,3,-1] and only two spaces, it will show : 1500 000,00
if you put [3,3,-1] and three spaces, it will show : 1 500 000,00
if you put [] and as many space you want space, it will show 1500000,00
Effectively, it's the right thing.
But not only two, also 3 or 4. It depends on what you put in format text
exemple with 1 500 000
if you put [3,3,-1] and only two spaces, it will show : 1500 000,00
if you put [3,3,-1] and three spaces, it will show : 1 500 000,00
if you put [] and as many space you want space, it will show 1500000,00