Various minor edits
diff --git a/Doc/howto/doanddont.tex b/Doc/howto/doanddont.tex
index a105ca1..28ef7c3 100644
--- a/Doc/howto/doanddont.tex
+++ b/Doc/howto/doanddont.tex
@@ -32,7 +32,7 @@
\subsubsection{Inside Function Definitions}
\code{from module import *} is {\em invalid} inside function definitions.
-While many versions of Python do no check for the invalidity, it does not
+While many versions of Python do not check for the invalidity, it does not
make it more valid, no more then having a smart lawyer makes a man innocent.
Do not use it like that ever. Even in versions where it was accepted, it made
the function execution slower, because the compiler could not be certain