Allow internal lint INVALID_PATHS for itertools path

Since clippy_utils doesn't depend on the itertools crate anymore, the
lint can't find the path.

Author: flip1995

clippy_lints/src/utils/internal_lints.rs

@@ -892,7 +892,7 @@ impl<'tcx> LateLintPass<'tcx> for InvalidPaths {
                 }).collect();
             if !check_path(cx, &path[..]);
             then {
-                span_lint(cx, CLIPPY_LINTS_INTERNAL, item.span, "invalid path");
+                span_lint(cx, INVALID_PATHS, item.span, "invalid path");
             }
         }
     }

clippy_utils/src/paths.rs

@@ -68,6 +68,7 @@ pub const IO_WRITE: [&str; 3] = ["std", "io", "Write"];
 pub const IPADDR_V4: [&str; 5] = ["std", "net", "ip", "IpAddr", "V4"];
 pub const IPADDR_V6: [&str; 5] = ["std", "net", "ip", "IpAddr", "V6"];
 pub const ITER_REPEAT: [&str; 5] = ["core", "iter", "sources", "repeat", "repeat"];
+#[allow(clippy::invalid_paths)] // internal lints do not know about all external crates
 pub const ITERTOOLS_NEXT_TUPLE: [&str; 3] = ["itertools", "Itertools", "next_tuple"];
 #[cfg(feature = "internal-lints")]
 pub const KW_MODULE: [&str; 3] = ["rustc_span", "symbol", "kw"];

tests/ui-internal/invalid_paths.stderr

@@ -4,7 +4,7 @@ error: invalid path
 LL |     pub const BAD_CRATE_PATH: [&str; 2] = ["bad", "path"];
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = note: `-D clippy::clippy-lints-internal` implied by `-D warnings`
+   = note: `-D clippy::invalid-paths` implied by `-D warnings`
 
 error: invalid path
   --> $DIR/invalid_paths.rs:20:5