Cool a perl version of this (It doesn't do mail though, no idea I found it as I can't find it in most search engines. Some other sources, apparently it comes with debian?) This could be so handy, I wish I'd remember to use it more.

UPDATE</b: Also note it uses the inode and not the size to track changes, the author believes it to be more reliable.

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perl -pe "s/\b;([st])/'\1/mg"