trim trailing spaces

doc/crypt.tex

@@ -1515,7 +1515,7 @@ Similarly, this will OCB decrypt, and compare the internally computed tag agains
 appropriately.
 
 \subsection{CCM Mode}
-CCM is a NIST proposal for encrypt + authenticate that is centered around using AES (or any 16--byte cipher) as a primitive.  
+CCM is a NIST proposal for encrypt + authenticate that is centered around using AES (or any 16--byte cipher) as a primitive.
 
 \subsubsection{Initialization}
 To initialize the CCM context with a secret key call the following function.