Remove redundant slicing of whole range

Clippy emits:

  warning: redundant slicing of the whole range

As suggested, remove the redundant slicing of whole range.

Author: tcharding

src/descriptor/tr.rs

@@ -511,7 +511,7 @@ fn split_once(inp: &str, delim: char) -> Option<(&str, &str)> {
         }
         // No comma or trailing comma found
         if found >= inp.len() - 1 {
-            Some((&inp[..], ""))
+            Some((inp, ""))
         } else {
             Some((&inp[..found], &inp[found + 1..]))
         }

src/expression.rs

@@ -126,7 +126,7 @@ impl<'a> Tree<'a> {
             // String-ending terminal
             Found::Nothing => Ok((
                 Tree {
-                    name: &sl[..],
+                    name: sl,
                     args: vec![],
                 },
                 "",

src/miniscript/lex.rs

@@ -66,7 +66,7 @@ impl<'s> fmt::Display for Token<'s> {
         match *self {
             Token::Num(n) => write!(f, "#{}", n),
             Token::Hash20(b) | Token::Bytes33(b) | Token::Bytes32(b) | Token::Bytes65(b) => {
-                for ch in &b[..] {
+                for ch in b {
                     write!(f, "{:02x}", *ch)?;
                 }
                 Ok(())