fix corrupted pdf code example
Example: fix corrupt pdf command line
gs \
-o repaired.pdf \
-sDEVICE=pdfwrite \
-dPDFSETTINGS=/prepress \
corrupted.pdf
gs \
-o repaired.pdf \
-sDEVICE=pdfwrite \
-dPDFSETTINGS=/prepress \
corrupted.pdf