Fix double word typos.
diff --git a/Doc/lib/librfc822.tex b/Doc/lib/librfc822.tex
index e32493c..e7bbc28 100644
--- a/Doc/lib/librfc822.tex
+++ b/Doc/lib/librfc822.tex
@@ -46,7 +46,7 @@
data before discovering that the \cfunction{lseek()} system call
doesn't work. For maximum portability, you should set the seekable
argument to zero to prevent that initial \method{tell()} when passing
-in an unseekable object such as a a file object created from a socket
+in an unseekable object such as a file object created from a socket
object.
Input lines as read from the file may either be terminated by CR-LF or