How trim?

[Bob Warren]

Sometimes inexperienced Rev programmers have to ask questions that make 
them want to crawl under the table in shame because probably the answer 
is idiotically simple. Here is such a question.

If I have a string, say:-

"   The cat sat under the mat   "

- and I want to trim off the leading and following blanks to give:-

"The cat sat on the mat"

- how can I do this quickly in Transcript?

In Basic, it is very simple. You can use the functions LTrim$, RTrim$ or 
just Trim$ to lop off both sets of blanks.

Thanks very much in advance to the individual who will surely give me 
the answer in a flash.