property NSString : a reference to current application’s NSString
property NSCharacterSet : a reference to current application’s NSCharacterSet

tell application "CotEditor"
　　tell front document
　　　　set aCon to contents
　　end tell
end tell

set aList to paragraphs of aCon
set outList to {}

repeat with i in aList
　　set j to trimWhiteSpaceFromHeadAndTail(i) of me
　　set the end of outList to j
end repeat

outList

–指定文字列の前後から空白をトリミング
on trimWhiteSpaceFromHeadAndTail(aStr as string)
　　set aString to NSString’s stringWithString:aStr
　　set bString to aString’s stringByTrimmingCharactersInSet:(NSCharacterSet’s whitespaceAndNewlineCharacterSet())
　　return bString as list of string or string –as anything
end trimWhiteSpaceFromHeadAndTail