+#. TRANSLATORS: A regular expression testing for an affirmative answer
+#. (english: "yes"). Testing the first character may be sufficient.
+#. Take care to consider upper and lower case.
+#. To enquire the regular expression that your system uses for this
+#. purpose, you can use the command
+#. locale -k LC_MESSAGES | grep '^yesexpr='
+#: lib/rpmatch.c:147