How to convert a cell array of string s

I want to convert a cell of string into another like this. How can i do this? Thanks!

from into

Answer 1

[Walter Roberson]

temp = regexp(s, '(?<=\S)\s+', 'split');
s = vertcat(temp{:});

[Mai Le Thai]

Thanks for your help!

Can you please explain this '(?<=\S)\s+'?