Documentation about multi-line array (matrix) definition?

I found that I can use multi-line matrix literals. That is,
A = [1 2; 3 4; 5 6] % This is the common form we use. In a single line.
is the same as
A = [1 2
3 4
5 6] % Using multiple lines
This also applies to cell arrays.
However, I cannot find any documents about this.
Matrix tutorial https://www.mathworks.com/help/matlab/learn_matlab/matrices-and-arrays.html does not say about ths multi-line array creation.
Is there any documentation about this? Is this usable to all previous versions?

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I cannot infer that
A = [1 2
3 4
5 6]
is syntactically valid from this page. What I can see from this page is
A = [1 2; ...
3 4; ...
5 6]
is syntactically valid.
Why the obsession?, if I may.
Because I am not sure from which version MATLAB supports this syntax.
Official documents usually do not use this syntax, except some toolboxes.
Doesn't it work for older versions? Ok, as far as I surfed couldn't find it , perhaps it's undocumented.
I assume that this will work for older versions, but I haven't tried since I don't have one installed.
Thanks for the help.
If you're so curious about this maybe you can try to contact the technical team and dig out some infos if plausible. If that infact happens please get back.
As a note, I contacted the technical support, and they replied as follows:
  • ... We have confirmed that this behavior is indeed undocumented. On that note, I will be creating an enhancement request to our documentation team and they may implement it for one of our future updates based upon internal discussions. ...
  • ... this undocumented feature is stable and there are no plans as of now to remove it in our future releases. ...

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