Fix doc tests

Author: smoelius

clippy_lints/src/format_args.rs

@@ -62,11 +62,13 @@ declare_clippy_lint! {
     ///
     /// ### Example
     /// ```no_run
+    /// # use std::path::Path;
     /// let path = Path::new("...");
     /// println!("The path is {:?}", path);
     /// ```
     /// Use instead:
     /// ```no_run
+    /// # use std::path::Path;
     /// let path = Path::new("…");
     /// println!("The path is {}", path.display());
     /// ```