From: Peter Hickman <peter@...>
Date: 2002-06-13T19:49:31+09:00
Subject: Re: a new block parameter/variable notation (Re: ruby-dev  summary 17252-17356)

I would like to raise the issue of programming style here. The 
difference between = and := in a
large amount of code is far too easy to overlook. If this form of 
notation is introduced then I think
we are going to find ourselves writing a lot of bugs.

Additionally the name: (trailing collon notation) is also easy to overlook.

Just my ha'pence but several languages have been tripped up with this 
sort of 'human error', most
famously the NASA Fortran '.' bug.