Num2Str1Line:

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   Converts a matrix to a one line string.
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   Form:
   s = Num2Str1Line( n, d )
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   ------
   Inputs
   ------
   n        (:,:)  Number
   d        (1,1)  Number of decimal places

   -------
   Outputs
   -------
   s        (:)    String

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