Optimization in the detection if the text can be saved as ANSI
Optimization in the detection if the text can be saved as ANSI

Relates to #536 : Various corrections and improvements

Signed-off-by: Daniel Prado Velasco <c92a08b037db3875ec4154f62e176186b8312991@users.noreply.github.com>

dpradov/keynote-nf