- trimHead = dropWhile p
- trimTail = reverse . trimHead . reverse
-
--- |@'noCaseEq' a b@ is equivalent to @(map toLower a) == (map toLower
--- b)@
-noCaseEq :: String -> String -> Bool
-noCaseEq a b
- = (map toLower a) == (map toLower b)
-
--- |@'isWhiteSpace' c@ is True iff c is one of SP, HT, CR and LF.
-isWhiteSpace :: Char -> Bool
-isWhiteSpace = flip elem " \t\r\n"
+ go ∷ [AsciiBuilder] → AsciiBuilder → AsciiBuilder
+ {-# INLINE go #-}
+ go [] ab = ab
+ go (x:[]) ab = ab ⊕ x
+ go (x:xs) ab = go xs (ab ⊕ A.toAsciiBuilder sep ⊕ x)