avoid converting types into themselves via .into() (clippy::useless-conversion)

example: let x: String = String::from("hello world").into();

crates/syntax/src/ted.rs

@@ -122,5 +122,5 @@ fn ws_between(left: &SyntaxElement, right: &SyntaxElement) -> Option<SyntaxToken
     if right.kind() == T![;] || right.kind() == T![,] {
         return None;
     }
-    Some(make::tokens::single_space().into())
+    Some(make::tokens::single_space())
 }