Use @smallexample for the echo LC... command.

man/trouble.texi

@@ -672,10 +672,10 @@ was current when you started Emacs.  On GNU/Linux and Unix systems, or
 if you use a Unix-style shell such as Bash, you can use this shell
 command to view the relevant values:
 
-@example
+@smallexample
 echo LC_ALL=$LC_ALL LC_COLLATE=$LC_COLLATE LC_TYPE=$LC_TYPE \
   LC_MESSAGES=$LC_MESSAGES LC_TIME=$LC_TIME LANG=$LANG
-@end example
+@end smallexample
 
 Alternatively, use the @command{locale} command, if your system has it,
 to display your locale settings.