Use 'if let' instead of 'match'

src/bin/bat/main.rs

@@ -91,13 +91,10 @@ pub fn list_languages(config: &Config) -> Result<()> {
     let configured_languages = get_syntax_mapping_to_paths(config.syntax_mapping.mappings());
 
     for lang in languages.iter_mut() {
-        match configured_languages.get(&lang.name) {
+        if let Some(additional_paths) = configured_languages.get(&lang.name) {
-            Some(additional_paths) => {
             lang.file_extensions
                 .extend(additional_paths.iter().cloned());
         }
-            None => {}
-        }
     }
 
     let stdout = io::stdout();