clippy: Refactor string formatting to use shorthand syntax

Signed-off-by: Muhammad Mahad <mahadtxt@gmail.com>

Author: MahadMuhammad

src/errors.rs

@@ -108,7 +108,7 @@ impl fmt::Display for Error {
         let error_code = if error_code.is_empty() {
             error_code.to_owned()
         } else {
-            format!(".{}.", error_code)
+            format!(".{error_code}.")
         };
 
         let rel_line_number = if self.relative_line_num == 0 {

src/header.rs

@@ -84,8 +84,5 @@ fn parse_name_value_directive(line: &str, directive: &str) -> Option<String> {
 }
 
 fn to_dejagnu_edition(edition: &str) -> String {
-    format!(
-        "// {{ dg-additional-options \"-frust-edition={}\" }}",
-        edition
-    )
+    format!("// {{ dg-additional-options \"-frust-edition={edition}\" }}")
 }

src/transform.rs

@@ -49,7 +49,7 @@ pub fn transform_code(code: &str, stderr_file: Option<&str>) -> Result<String> {
                 if error.relative_line_num != 0 {
                     // We simply add the error message, not to worry about the code
                     // The error was printed by our overloaded `Display` trait
-                    new_line = format!("{}", error);
+                    new_line = format!("{error}");
                 } else {
                     // For the error on the same line, we need to add error message at the end of the line
                     let captures = captures_regex
@@ -62,7 +62,7 @@ pub fn transform_code(code: &str, stderr_file: Option<&str>) -> Result<String> {
                     let before_match = &line[..whole_match.start()];
 
                     // The error was printed by our overloaded `Display` trait
-                    new_line = format!("{}{}", before_match, error);
+                    new_line = format!("{before_match}{error}");
                 }
                 break;
             }