Fix typos #662

doc/generic/pgf/text-en/pgfmanual-en-tikz-arrows.tex

@@ -652,7 +652,7 @@ \subsubsection{Slanting}
 \subsubsection{Reversing, Halving, Swapping}
 \label{section-arrow-key-harpoon}
 
-\begin{key}{/pgf/arrow keys/reverse}
+\begin{key}{/pgf/arrow keys/reversed}
     Adding this key to an arrow tip will ``reverse its direction'' so that is
     points in the opposite direction (but is still at that end of the line
     where the non-reversed arrow tip would have been drawn; so only the tip is
@@ -683,7 +683,7 @@ \subsubsection{Reversing, Halving, Swapping}
 \tikz [ultra thick] \draw [arrows = {->[harpoon]}] (0,0) -- (1,0);
 \end{codeexample}
     %
-    Unlike the |reverse| key, which all arrows tip kinds support at least in a
+    Unlike the |reversed| key, which all arrows tip kinds support at least in a
     basic way, designers of arrow tips really need to take this key into
     account in their arrow tip code and often a lot of special attention needs
     to do be paid to this key in the implementation. For this reason, only some