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+# $EPIC: common.txt,v 1.2 2006/07/17 19:41:50 sthalik Exp $
+======Synopsis:======
+$__common__(<word list 1> / <word list 2>)
+======Technical:======
+   * There must be a literal slash character ('/') that separates the two word lists.  If it is omitted the empty string is returned.
+   * It is not required to have spaces on either side of the slash, but it also does not hurt to have them.
+   * The return value is a word list comprised of the set-intersection of <word list 1> and <word list 2>, that is to say:
+   * The return value is a word list of all words that are in BOTH of the word lists.
+   * All extra whitespace around words will be lost.
+   * Double quoted words are honored, but the double quotes will be lost in the return value.
+======Practical:======
+Use this function if you need to find the intersection of two different
+word lists.  A useful example might if you wanted to find out all of the
+people who are on two different channels.  If you have the nick lists to
+those two channels, you can use $common() to find all the people on both
+channels.
+======Returns:======
+All words that are in both <word list 1> and <word list 2>.
+======Examples:======
+<file>
+$common(one two three / two three four)     returns "two three"
+$common(one two / three four)               returns ""  (empty string)
+</file>