Typo fix.

Doc/doc/doc.tex

@@ -933,7 +933,7 @@ This \UNIX\ is also followed by a space.
 
     \begin{macrodesc}{programopt}{\p{option}}
       A command-line option to an executable program.  Use this only
-      for ``shot'' options, and include the leading hyphen.
+      for ``short'' options, and include the leading hyphen.
     \end{macrodesc}
 
     \begin{macrodesc}{longprogramopt}{\p{option}}