fixed another typo in the manual

doc/manual.tex

@@ -5225,7 +5225,7 @@ inorder.
 \begin{itemize}
 \item preorder tags the root first, then the subtrees
 \item postorder tags the subtrees first, then the root
-\item inorder tags the first subtrree first, then the root, and then the remaining subtrees
+\item inorder tags the first subtree first, then the root, and then the remaining subtrees
 \end{itemize}
 \item Whatever method of traversal is used, it can apply to the whole tree, just the
 leaves, or just the non-terminal nodes, but depth first traversals applying only
@@ -23752,13 +23752,13 @@ left less than the right.
 
 \subsubsection{Interval type features}
 
-The mnemonic for the interval type is \verb|v|, so it may be used
+The mnemonic for the interval type is \verb|H|, so it may be used
 in type expressions like \verb|%H| or \verb|%HL|,\/ \emph{etcetera}.
 This mnemonic is chosen so as not to clash with any already defined,
 thereby maintaining backward compatibility. A small number of unused
 type mnemonics is available, which can be listed as shown.
 \begin{verbatim}
-$ fun tco --m="~&j/letters ~&nSL type_constructors" --c
+$ fun tco --m="~&lrnSL2j/letters type_constructors" --c
 'FHK'
 \end{verbatim}%$