Sometimes when I am parsing dirty text, there are tabs mixed with spaces, and even other whitespace characters. So, the "trim" function almost does what I want, but because it is limited to a single character, it doesn't work on such dirty text.
So, I request that in the "trim" section, you add words similar to this:
To trim arbitrary whitespace from the beginning and end of a string, you can do this:
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(set 'str " \t Hello World!\t \t")
(replace "^\s+|\s+$" str "")
=> "Hello World!"
I suggest you add this to the documentation, because as a new user, when I want to "trim" the whitespace from the edges of my strings, the "trim" function is the first place I look. And I imagine this isn't an uncommon case. I actually haven't ever needed to use the trim function in its current form.
Or if you added a "regex" version of trim, with a trailing regex options parameter, then I could do
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(trim " \t foo \t " "\s" 0) => "foo"
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