This is off-topic, but is intended to be helpful to you in the future. You had posted:

Hi, >different output formats use different quoting mechanisms, >and your example system call wouldn't know that ' is a >single quote. For example? Thanks so far David J

If you had made use of <blockquote> and </blockquote>, your post would have looked like:

Hi,

different output formats use different quoting mechanisms, and your example system call wouldn't know that ' is a single quote.

For example? Thanks so far David J

This is slightly more readable. (Remember, if it looks odd to you when you Preview a post, imagine how it looks to us.)