(Prefix Command Arguments): Minor cleanup.

lispref/commands.texi

@@ -2780,7 +2780,7 @@ command, so setting it has no effect on the prefix arguments for future
 commands.
 
   Normally, commands specify which representation to use for the prefix
-argument, either numeric or raw, in the @code{interactive} declaration.
+argument, either numeric or raw, in the @code{interactive} specification.
 (@xref{Using Interactive}.)  Alternatively, functions may look at the
 value of the prefix argument directly in the variable
 @code{current-prefix-arg}, but this is less clean.