The stately := operator feature proposal

[MrzlganeE]

If the programmer cannot make a distinction between an assignment 
and a declaration operator, there will be a lot of trouble!

You could say, p * q and p = q are not visually distinct. They 
only rely on the difference of an operator to distinguish them.

We can go through countless variations within the language where 
you get your work done every day relying on visually distinct 
elements more subtle than this one.