Remove extra empty line.

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@21120 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

doc/faq.texi

@@ -321,7 +321,6 @@ from all but the first stream. This can be accomplished by piping through
 @code{tail} as seen below. Note that when piping through @code{tail} you
 must use command grouping, @code{@{  ;@}}, to background properly.
 
-
 For example, let's say we want to join two FLV files into an output.flv file:
 
 @example