Adding mention of `end` parameter for `print`

Based on:

From: sourin.sutradhar@gmail.com

Hi Swaroop,

I am a C/C++ programmer. Recently I have started learning python from
your book. Your way of writing is really awesome and clean. As for
suggestion, I think it would be nice if you add a small section on
formatted output.

For example:

In your PDF version of Byte of python, at the end of page 44 in
section8.3, you have described a program to print numbers using for
loop. But as per the output all the numbers are getting printed in new
lines. This is confusing , especially for C/C++/Java programmers. As for
such situations you can add a note describing that to avoid the newline,
one can also write is as follows (though there are many other methods):

for i in range(1,5):
   print(i, end=' ')
#to avoid newline

Or you can add a whole section in the book to descrive formatted output
in python. That will be helpful for beginners.

Thank you Swaroop. Really enjoying your book on Python.

Best of luck.