Correct typo emtpy -> empty

Thanks to Martin Kunz <kunzmart@fjfi.cvut.cz> for the report

diff --git a/flashcards.dtx b/flashcards.dtx
index 307c2694dd1468fb4aae8746df047ed5585d0569..20d55c81c54305d781dab440dfae1c42723b859e 100644 (file)
--- a/flashcards.dtx
+++ b/flashcards.dtx
@@ -524,7 +524,7 @@
 }
 %
 \newcommand{\flashcards@ps@back@begin@empty}{\flashcards@format@back}
-\newcommand{\flashcards@ps@back@end@emtpy}{}
+\newcommand{\flashcards@ps@back@end@empty}{}
 \newcommand{\flashcards@ps@back@begin@plain}
   {\vspace*{\fill}\center\flashcards@format@back}
 \newcommand{\flashcards@ps@back@end@plain}{\vspace*{\fill}}