Binary files a/docs/signatures.pdf and b/docs/signatures.pdf differ

@@ -99,7 +99,7 @@ How do I look in hex?

 	matching is only available in libclamav with the functionality level

 	15 therefore please only use it with .ndb signatures, each followed

 	by ":15" (MinEngineFunctionalityLevel, see \ref{ndb}).

-	\item \verb+a?+\\

+	\item \verb+?a+\\

 	Match low nibble (low four bits).

 	\item \verb+*+\\

 	Match any number of bytes.