zulipterminal/cli/run.py: Changed the output and outputting statements.

Author: sumagnadas

zulipterminal/cli/run.py

@@ -248,8 +248,14 @@ def main(options: Optional[List[str]]=None) -> None:
         sys.exit(0)
 
     if args.list_themes:
-        print('\nThemes available:-',)
-        print('\t' + "\n\t".join(all_themes()) + '\n')
+        available_themes = all_themes()
+        theme_aliases = aliased_themes()
+        print('Themes available:-')
+        for i, j in theme_aliases.items():
+            if not i == 'default':
+                print('    {} ({})'.format(i, j))
+            else:
+                print('    {} ({})'.format(j, i))
         sys.exit(0)
 
     if args.config_file: