--- a/ProgTutorial/Tactical.thy Wed Jul 22 15:15:22 2009 +0200
+++ b/ProgTutorial/Tactical.thy Wed Jul 22 15:31:22 2009 +0200
@@ -146,7 +146,7 @@
\end{isabelle}
This means they failed.\footnote{To be precise tactics do not produce this error
- message, the it originates from the \isacommand{apply} wrapper.} The reason for this
+ message, it originates from the \isacommand{apply} wrapper.} The reason for this
error message is that tactics
are functions mapping a goal state to a (lazy) sequence of successor states.
Hence the type of a tactic is: