HighlightingAssets: Turn get_syntax_for_path() into public API

src/bin/bat/main.rs

@@ -104,10 +104,8 @@ pub fn get_languages(config: &Config) -> Result<String> {
             }
 
             let test_file = Path::new("test").with_extension(extension);
-            let syntax_in_set = assets
-                .get_syntax_for_file_name(test_file, &config.syntax_mapping)
-                .unwrap(); // safe since .get_syntaxes() above worked
-            matches!(syntax_in_set, Some(syntax_in_set) if syntax_in_set.syntax.name == lang_name)
+            let syntax_in_set = assets.get_syntax_for_path(test_file, &config.syntax_mapping);
+            matches!(syntax_in_set, Ok(syntax_in_set) if syntax_in_set.syntax.name == lang_name)
         });
     }