rust: fix inherent to string

Bug: OISF#4618

rust/src/lib.rs

@@ -62,7 +62,6 @@
 #![allow(clippy::branches_sharing_code)]
 #![allow(clippy::while_let_loop)]
 #![allow(clippy::redundant_pattern_matching)]
-#![allow(clippy::inherent_to_string)]
 #![allow(clippy::field_reassign_with_default)]
 #![allow(clippy::collapsible_match)]
 

rust/src/smb/ntlmssp_records.rs

@@ -15,6 +15,7 @@
  * 02110-1301, USA.
  */
 
+use std::fmt;
 use nom::IResult;
 use nom::combinator::rest;
 use nom::number::streaming::{le_u8, le_u16, le_u32};
@@ -27,9 +28,9 @@ pub struct NTLMSSPVersion {
     pub ver_ntlm_rev: u8,
 }
 
-impl NTLMSSPVersion {
-    pub fn to_string(&self) -> String {
-        format!("{}.{} build {} rev {}",
+impl fmt::Display for NTLMSSPVersion {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}.{} build {} rev {}",
                 self.ver_major, self.ver_minor,
                 self.ver_build, self.ver_ntlm_rev)
     }