clippy_dev: Use the new ranges.

clippy_dev/src/deprecate_lint.rs

@@ -132,14 +132,14 @@ fn remove_lint_declaration(name: &str, path: &Path, lints: &mut Vec<Lint>) -> io
             );
 
             assert!(
-                content[lint.declaration_range.clone()].contains(&name.to_uppercase()),
+                content[lint.declaration_range].contains(&name.to_uppercase()),
                 "error: `{}` does not contain lint `{}`'s declaration",
                 path.display(),
                 lint.name
             );
 
             // Remove lint declaration (declare_clippy_lint!)
-            content.replace_range(lint.declaration_range.clone(), "");
+            content.replace_range(lint.declaration_range, "");
 
             // Remove the module declaration (mod xyz;)
             let mod_decl = format!("\nmod {name};");

clippy_dev/src/lib.rs

@@ -1,9 +1,11 @@
 #![feature(
-    rustc_private,
     exit_status_error,
     if_let_guard,
+    new_range,
+    new_range_api,
     os_str_slice,
     os_string_truncate,
+    rustc_private,
     slice_split_once
 )]
 #![warn(

clippy_dev/src/parse.rs

@@ -2,7 +2,7 @@ pub mod cursor;
 
 use self::cursor::Cursor;
 use crate::utils::{ErrAction, File, expect_action};
-use core::ops::Range;
+use core::range::Range;
 use std::fs;
 use std::path::{Path, PathBuf};
 use walkdir::{DirEntry, WalkDir};

clippy_dev/src/release.rs

@@ -23,7 +23,7 @@ pub fn bump_version(mut version: Version) {
                 dst.push_str(&src[..package.version_range.start]);
                 write!(dst, "\"{}\"", version.toml_display()).unwrap();
                 dst.push_str(&src[package.version_range.end..]);
-                UpdateStatus::from_changed(src.get(package.version_range.clone()) != dst.get(package.version_range))
+                UpdateStatus::from_changed(src.get(package.version_range) != dst.get(package.version_range))
             }
         });
     }

clippy_dev/src/utils.rs

@@ -1,6 +1,6 @@
 use core::fmt::{self, Display};
 use core::num::NonZero;
-use core::ops::Range;
+use core::range::Range;
 use core::str::FromStr;
 use std::ffi::OsStr;
 use std::fs::{self, OpenOptions};