vim yellow lines problem

[Tapas Mishra]

I had a C program which I copy pasted and there were line numbers in code.
So I replaced line numbers in vi by following command
:%s/\d*.  (<-- last of * is a dot)

Now I am opening vim in cygwin then all typed lines are coming yellow.
https://i.stack.imgur.com/Dxd8h.jpg

How do I fix this problem,
--------
Thanks

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple