dpkg: Coalesce similar “takes no arguments” strings

Move the option name to an argument to reuse existing translations.

src/trigcmd.c

@@ -200,7 +200,8 @@ main(int argc, const char *const *argv)
 
 	if (f_check) {
 		if (*argv)
-			badusage(_("--check-supported takes no arguments"));
+			badusage(_("--%s takes no arguments"),
+			         "check-supported");
 		do_check();
 	}
 

src/update.c

@@ -98,7 +98,8 @@ void updateavailable(const char *const *argv) {
 }
 
 void forgetold(const char *const *argv) {
-  if (*argv) badusage(_("--forget-old-unavail takes no arguments"));
+  if (*argv)
+    badusage(_("--%s takes no arguments"), cipaction->olong);
 
   warning(_("obsolete '--%s' option, unavailable packages are automatically cleaned up."),
           cipaction->olong);