mtlb_fprintf Matlab fprintf emulation function

## Description

There is no Scilab exact equivalent for Matlab `fprintf`. Scilab `mfprintf` and Matlab `fprintf` behave differently in many cases, but they are equivalents in some cases.

The function `mtlb_fprintf(varargin)` is used by `mfile2sci` to replace `fprintf`. This function will determine the correct semantic at run time. It is sometimes possible to replace calls to `mtlb_fprintf` by calls to mfprintf.

Caution: `mtlb_fprintf` has not to be used for hand coded functions.

## See also

- mfprintf