Require (some) binary operators to have spaces around them

[hopscc]

In the interests of having canonical formatting in expressions, force some (subset) of the binary operators to only be accepted when have spaces around them
e.g

# wrt ASSIGN(=) 
#rather than accepting
name= a.b.foo
# or
name =a.b.foo

# Only allow
name = a.b.foo
#must have at least one space fore and aft around the =

Discussion  Require spaces around Binary ops

Subset should probably include

• math operators ( +,-,*, /, **, %)
• Assignment(=) and (perhaps equals (==) )
• nil and nonnil coalesce (? and !)
• Others?...

This is a reasonably major change so should probably be compiler suppressible.

[hopscc]

require spaces on ASSIGN and EQ.
(Apply this patch in the cobra Source directory)

Extend as desired to test effect with other operators...

[Charles]

related to ticket:339 "Provide a nil safe dereference operator"