According to the docu there are some new features in texlive 2014. One of them is a command
\pdfinterwordspaceon. It seems as if it adds spaces between the words, so that I can just copy and paste from a PDF. OK.
Can somebody give an example where this command is useful? Years ago I had issues with text copied from PDF without any space between words, but that was long ago. Even under texlive 2013 I can open a PDF and copy the text including the spaces between words.