update description of the lint

Author: relaxcn

clippy_lints/src/methods/mod.rs

@@ -4531,21 +4531,33 @@ declare_clippy_lint! {
 
 declare_clippy_lint! {
     /// ### What it does
-    /// Detects hardcoded localhost IP addresses using `Ipv4Addr::new(127, 0, 0, 1)`.
+    /// Checks for IP addresses that could be replaced with predefined constants such as 
+    /// `Ipv4Addr::new(127, 0, 0, 1)` instead of using the appropriate constants.
     ///
     /// ### Why is this bad?
-    /// Using a hardcoded IP address `(127.0.0.1)` is less clear and maintainable than using the
-    /// `Ipv4Addr::LOCALHOST` constant.
+    /// Using specific IP addresses like `127.0.0.1` or `::1` is less clear and less maintainable than using the
+    /// predefined constants `Ipv4Addr::LOCALHOST` or `Ipv6Addr::LOCALHOST`. These constants improve code
+    /// readability, make the intent explicit, and are less error-prone.
     ///
     /// ### Example
     /// ```no_run
-    /// use std::net::Ipv4Addr;
-    /// let addr = Ipv4Addr::new(127, 0, 0, 1);
+    /// use std::net::{Ipv4Addr, Ipv6Addr};
+    /// 
+    /// // IPv4 loopback
+    /// let addr_v4 = Ipv4Addr::new(127, 0, 0, 1);
+    /// 
+    /// // IPv6 loopback  
+    /// let addr_v6 = Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1);
     /// ```
     /// Use instead:
     /// ```no_run
-    /// use std::net::Ipv4Addr;
-    /// let addr = Ipv4Addr::LOCALHOST;
+    /// use std::net::{Ipv4Addr, Ipv6Addr};
+    /// 
+    /// // IPv4 loopback
+    /// let addr_v4 = Ipv4Addr::LOCALHOST;
+    /// 
+    /// // IPv6 loopback
+    /// let addr_v6 = Ipv6Addr::LOCALHOST;
     /// ```
     #[clippy::version = "1.89.0"]
     pub IP_CONSTANT,