Don't special-case choices2

src/choice/mod.rs

@@ -7,10 +7,7 @@ where
     P2: Parser<I, O, E>,
     I: ParserInput + Clone,
 {
-    move |input: I| match parser1.parse(input.clone()) {
+    choice((parser1, parser2))
-        ok @ Ok(..) => ok,
-        Err(_e) => parser2.parse(input),
-    }
 }
 
 pub fn choice<C, I, O, E>(choices: C) -> (impl Parser<I, O, E>, Bnf)